
When your notation isn't enough, it's better to make up new numbers on the spot.
Has two popular varieties:
 Using zillions, skyrillions and other such words as real (but ridiculously high) numbers. Often lampshaded.
 Just making up numbers when their correct meaning may be guessed: for example, "eleventy" must be 110.
Of course, there are plenty of real large numbers ending in illion, usually formed with boring Latin prefixes  The Other Wiki, as always, has a list.
Ridiculous Future Inflation can be a cause of this. Usually a Comedy Trope. Justified when a character really uses another notation. For money, compare ZillionDollar Bill and contrast Undisclosed Funds.
This is not to be confused with the mathematical concept of imaginary numbers, which are far more useful, especially when computing the square root of a negative number, and have very real applications to things like electronic systems.
Examples:
open/close all folders
Comics
 Disney Ducks Comic Universe:
 In Carl Barks's "Some Heir Over The Rainbow," Scrooge's fortune is given as nine fantasticatillion, four billionjillion, centrifugalillion dollars and sixteen cents.
 In the climax of "The Crazy Quiz Show", Donald Duck's final question (and his Unexpectedly Obscure Answer) was the following:
Q: How many drops of water pass over Niagara Falls in a week? A: Nine trillion multipadillion, six hundred and eightysix squadrificillion, fifty octodecimadillion, eight hundred and sixtythree centrifipillion, nine hundred and forty overplusillion, six hundred and five duplicatillion, thirtythree impossibadillion, seven hundred and ninetyone compounded ultrafatillion, three hundred and forty super trillion, fiftynine duper dillion, twentynine billion, seven hundred and fifty million, four hundred and six thousand, five hundred and thirtythree drops.
Commercials
 "Did you know women prefer Old Spice for their men one bajillion times more than ladies' scented body washes? Did you know that I'm riding this horse backwards? Hyah!"
 There's an ING commercial where one man is carrying around a sign that reads 1.2 million dollars which is the amount that he knows he needs to have in order to live comfortably in retirement. His next door neighbor has a sign that says "A Gazillion" to illustrate that he doesn't know what he requires for retirement and thus needs the company's services.
Fan Works
Film
 Duplex
Nancy Kendricks: Well it's going to be worth a bazillion times that.
 Who Framed Roger Rabbit
Eddie Valiant: We were investigating a robbery at the First National Bank of Toontown. [snip] Anyway, this guy got away with a zillion simoleons.
 Might actually be justified (and not just by Rule of Funny). "Zillion" might in fact be a number in Toon, and one wonders if there's an exchange rate for "simoleons".
 Or you could always spend them in SimCity.
 Undercover Brother
The Chief: Didn't you cause about a bazillion dollars worth of damage?
 Hercules
Hades: Uh, yeah, Poseidon, about a zillion times...
 Starship Troopers (also used in the book).
Trooper: Bugs, Mr. Rico! Zillions of 'em!
 To modern ears, Back to the Future's famous "1.21 jiggawatts" sounds like this, but it's really just an outdated pronunciation of "gigawatts".
 Austin Powers: Dr. Evil holds the world hostage for "1 billion, gagillion, fafillion, shabolubalu million illion yillion...yen". The UN deems it a reasonable price.
 This was a reference to the two previous films:
 In International Man of Mystery, Dr. Evil decides to hold the world hostage for "one million dollars!" A large amount of money in 1967... not so much in 1997. Number Two convinces him to hold the world ransom for the more reasonable amount of "one hundred... billion... dollars." When he calls the UN to give them his demands, he accidentally gives them the one million dollar price and they laugh in his face  and are then shocked when he gives the real amount.
 In The Spy Who Shagged Me, Dr. Evil contacts the White House and demands the sum of "one hundred billion dollars!" He's met with ridicule because it's 1969: there isn't that much money in the entire world. He then gives the one million dollar figure and they predictably panic.
 He also states in the second film "Why make trillions when we can make billions", which Scott proceeds to angrily correct. Seems Dr. Evil just really sucks at both math and economics.
 Pee Wees Big Adventure: "I wouldn't sell my bike for all the money in the world  not for a hundred million billion trillion dollars!" The end result is a one with 29 zeroes after it.
 In the beginning of Toy Story, the wanted poster of Mr. Potato Head shows the "$50 bzillion" reward. Of course, the drawing was done by a six year old boy.
Jokes
 Donald Rumsfeld briefed the President this morning. He told Bush that three Brazilian soldiers were killed in Iraq. To everyone's amazement, all of the colour ran from Bush's face, then he collapsed onto his desk, head in hands, visibly shaken, almost whimpering. Finally, he composed himself and asked Rumsfeld, "Just exactly how many is a brazillion?"
Literature
 Not for a Billion Gazillion Dollars by Paula Danzinger.
 From The Lord of the Rings: Bilbo proclaims, "Today is my 111th birthday: I am eleventyone today!" The term is apparently normal for hobbits, who live longer than humans. It's derived from Old English: hund endleofantig).
 In Life, the Universe and Everything, the Krikkit Wars apparently resulted in two grillion casualties.
 Witches Abroad:
"Bet you a million trillion zillion dollars you can't turn that bush into a pumpkin," said the child.
...
"Nothing. Just thinking. And you owe me a million trillion zillion squillion dollars."
 A variation in The Science of Discworld, in which imaginary numbers are parodied with The Bursar suggesting that there's an extra number between three and four called 'umpt'. A Stealth Pun about 'umpteen', umpt presumably being that minus ten.
 Dave Barry once proposed that Congress should use the "Whomptillion", defined as "an amount of money so huge that every time a Congressman says the word, your taxes go up 5%".
 In the last Ramona Quimby book, Ramona turns ten, but refers to herself as "zeroteen" because she thinks the way the first three doubledigit numbers get left out of the "teens" is arbitrary and unfair.
 In Beezus and Ramona, when she's five, she weighs herself and comes up with "fiftyeleven pounds."
Live Action TV
 The Cosby Show
 Saturday Night Live
Alex Trebek: [to Keanu] Let's see what you wagered: Eleventy billion dollars. That's not even a real number.
Keanu Reeves: Yet.
 In another episode, Alex threw out the final category and told the contestants to write down any number at all in order to win. Jimmy Fallon's French Stewart went with "threeve" and then wagered "$Texas."
 Parodied on That Mitchell and Webb Look, in a Numberwang sketch where an "Imaginary Numbers" round is played. Somehow, while "Twentington" and "Frilve hundred and Neeb" are accepted, "Shintysix" (depicted as fiftysix with a reversed five) is rejected as a real number, as in the popular phrase, "I only have shintysix days left to live."
 Timmy Mallet's children's breakfast show from The Eighties, Wacaday, popularised "squillion". This recently reemerged when Nick Clegg used it in one of the British prime ministerial debates.
 In the episode "Culture for the Masses" in The Goodies, Tim buys a painting at an auction for "one million billion quintillion zillion pounds and two and a half new pence", which it goes without saying that he does not have. They leave thirteen pence as a deposit. By Contrived Coincidence, the National Gallery have all their paintings insured for exactly one million billion quintillion zillion pounds. Hilarity Ensues.
 The TV Series of The Hitchhiker's Guide to the Galaxy extends a line of dialogue from the book and puts in a new number:
Ford Prefect: I think this ship is brandnew, Arthur.
Arthur Dent: Why, have you got some exotic device for measuring the age of metal?
Ford Prefect: No. I just found this sales brochure on the floor. It says, "The Universe can be yours for a mere five quilliard Altairian dollars."
Arthur Dent: Cheap?
Ford Prefect: A quilliard is a whole page full of noughts [ zeros] with a one at the beginning.
 Mr. Show featured a sketch set in the 1890s which revolved around a marching band competition judged by the "EleventyTwelfth President of the United States".
 There was a series of sketches on MADtv parodying Schoolhouse Rock and one of the songs parodied was "Three is a Magic Number". The lyrics went like:
3, 6, 9
12, 47, 90
Something, next, 100
3 times 10 is 2
3 times 5 is elevendy
3 times 2 is I dunno
 How I Met Your Mother: "I would bet you a gazillion dollars — no, I'm even more confident — I would bet you a floppityjillion dollars."
Music
 JayZ's "Allure":
"The game is a light bulb with eleventymillion volts"
 Usher's "Burn" has this:
"It's been fiftyeleven days, umpteen hours, I'm gonna be burnin' 'til you return!"
Newspaper Comics
 Calvin and Hobbes:
 On a math test, Calvin asks Suzie for an answer, and she responds "three hundred billion gazillion." This is then lampshaded, as Calvin proceeds to snark her for giving such a "helpful" answer. Susie then follows up by saying that it's a 3, followed by 85 zeroes, and Calvin writes it down.
 Spaceman Spiff also tends to use these kinds of "illion" numbers.
 When Calvin asks Hobbes for help with his math homework, Hobbes notes that it requires calculus and imaginary numbers, "You know, eleventeen, thirtytwelve, and all those." (Imaginary numbers, by the way, are a real mathematical concept, but not the way Hobbes puts it.)
 Dilbert has "frooglepoopillion".
Pinball
Theatre
 In "The Rain Song" from 110 in the Shade, Starbuck boasts that he knows "forty'leven different methods" for bringing rain.
Video Games
 The Eleventy Billionth HoKage insists that "eleventy" means "eleven more than everything"
 One selling point of Borderlands was its "87 bazillion" guns. The actual number of weapon combinations is quite high, but doesn't even come close to the "billion" moniker.
 In Mother 2 (the Japanese Version), Porky's dad claims Ness' family owes him an unrealistic value, something equivalent to "hundred million jillion dollars". In the US version, it was changed to a realistic value of hundred thousand dollars or more. Later in the game, Ness and company acquire a diamond said to be worth a similarly unrealistic value, but the translation made it worth an even one million.
 When Strong Bad, and Tycho argue over whose website gets more hits per month in Poker Night at the Inventory, Strong Bad argues that Tycho's gets about a few blajillion. On Monday, several katillion hits. On Tuesday, half a blazillillion.
Web Comics
Web Original
Western Animation
 Scrooge McDuck earns these amounts daily. His total fortune is given here as Five multiplujillion, nine impossibidillion, seven fantasticatrillion dollars and seventeen cents.
 In the Dutch versions, his inane amounts always end at "...and sixteen cents" instead. List your country too if it deviates!
 Fairly Oddparents: Norm the Genie tries to get Timmy to order a million billion jillion dollars. Timmy says he knows there's no such number as a jillion, and wishes for the billion. Hilarity Ensues  he never said they would be "real".
 In Frosty the Snowman (1969) Forgiveness for what Professor Hinkle did comes with a rather stiff price:
Santa Claus: Now you go home and write "I am very sorry for what I did to Frosty" 100 zillion times.
 And it's implied at the end he succeeded, because he got the new hat he wanted.
 Animaniacs episode "Flipper Parody/Temporary Insanity/Operation: Lollipop/What Are We?": a check for 80 zillion dollars.
 Batman Beyond episode "The Winning Edge"
Batman: Come on, he must be a zillion years old.
 Family Guy:
Senator 1: I say we fine the El Dorado Tobacco Company infinty billion dollars!
Senator 2: That's the spirit! But I think a real number might be more effective.
 Codename: Kids Next Door
 In an operation at an ice cream factory, Numbuh Three finally finds a thermostat and promptly cranks it to the "Like eleventy bajillion degrees!" setting.
 There's a villain who always says he wants a buhmillion dollars (denoted as $BUH.000.000).
 In fact, the number "eleventy billon" is thrown around quite frequently, presumably meaning 110×10^{9}, or 110,000,000,000. Even Father says it in Operation: Z.E.R.O..
 On The Penguins of Madagascar, when Kowalski is asked about a number that's less than nothing, he comes up with "negfinity".
 In the Sponge Bob Square Pants episode "Truth or Square", the Krusty Krab celebrates its eleventyseventh anniversary.
 In one episode of Doug, the titular character is imagining an utterly onesided baseball game. After Doug strikes out again and Patty asks Skeeter for the score, Skeeter replies, "A bajillion to nothing."
 In one episode of Futurama, when Fry was bidding against Mom for the last can of anchovies on Earth:
Crowd: (gasps)
Auctioneer: Sir, that's not a number.
Crowd: (gasps louder)
 On U.S. Acres, Roy once won "one skillion dollars" while competing on a game show.
 In an episode of Jimmy TwoShoes, when asked by Lucius how many times Beezy has saved his life, Beezy says "Tweleven!"
 In the Kim Possible episode "The Big Job", Señor Senior Junior records his ransom demands:
Señor Senior Junior: Hello everyone. If you are interested in having the five richest people in the world safely returned to you, you need to convey to us the sum of a bazillion zillion dollars.
Shego (offscreen): That’s not a real number.
Señor Senior Junior: But it sounds so impressive! And don't you like my evil chortle?
Shego (pushing SSJ aside): Hi, he's new at this. A billion dollars apiece will do just fine.
 The Duck Dodgers episode, "The Six Wazillion Dollar Duck" lampshades this completely.
Dodgers: Is that a lot?
Dr. IQ High: It's so much money that we actually had to make up a number and multiply it by six just to count it.
 The "Broadway Magic" episode of Jem had Eric Raymond offering the real amount of one million dollars to anyone who could reveal Jem's secret identity, a man from a fake sweepstakes company approached Jem with a check for one ZILLION dollars and said that the money was hers if she signed her real name.
 From The Simpsons episode, "Milhouse of Sand and Fog".
Bart: Mom, Dad, I'd give a kajillion dollars for you two to get back together.
Homer: Make it 2 kajillion.
Marge: Homer!
Homer: We'll lose the first kajillion to taxes.
 Parodied in Gravity Falls after Mabel starts hallucinating from eating too much Smile Dip.
Dipper: Mabel, how many of these did you eat?!
Mabel: Bleventeen...
Real Life
 The technical name for a googol, if you were to extrapolate from the usual naming convention, would be "ten duotrigintillion", or "ten thousand sexdecillion"/"ten sexdecilliard" on the long scale (where a billion equals one million millions), or we could just say 10^100 and call it a day.
 Hilariously, the term was supposedly coined by mathematician Edward Kasner's young nephew upon being asked for a large number.
 Truth in Television: Graham's number is so ridiculously huge that we have to use another notation to write it.
 If we were to use the normal notation, we'd need a new universe to write it, as this one is entirely too small. For a time it was the largest number ever used seriously in a mathematical proof, though it's since lost this title to other numbers.
 We would need many universes the size of this one just to write the number for how much too small the universe is to write g1, the first term in an expansion that increases so ridiculously fast that it makes "exponential increase" look like a flat line (to give some idea, the expansion that results in g1 itself starts "3, 7.6 trillion, ..." and there are over 7.6 trillion terms in that expansion alone). Graham's number is g64.
 It is so ridiculously huge that the amount of information required to write it down completely in your head is enough to literally collapse your head into a black hole. This video gives an idea of how huge it is.
 There is an entire thread on the XKCD forums dedicated to creating ever larger and larger numbers. After about 5 pages of this, the numbers being thrown around make Graham's Number seem like a speck of dust in comparison. After another 10 pages... let's just say that the numbers are so large that the math to understand these numbers gets progressively harder and harder to understand.
 Probably set in motion by this comic. The Ackermann Function tends to return huge values for even the smallest numbers (The Other Wiki says A(4,3) has 6.031*10^19727 digits). Now imagine Graham's number as the input. "AUGHHH" indeed.
 Numbers in French.
 The same principle as "twelve" ("douze") is continued up to 16 ("seize").
 "Seventy" ("septante") has only some rare regional use outside of France. Usually, it's "sixtyten" ("soixantedix").
 "Eighty" ("octante") is even rarer, and the standard French term for 80 is even stranger, namely "fourtwenty" ("quatrevingt").(Why do you call it stranger? I’d have thought at least some English speakers would be familiar with the parallel English expression “four score”.)
 "Ninety" ("nonante") is as rare as "seventy" ("septante"). 90 would be "fourtwentyten" ("quatrevingtdix").

