Centillion

The number centillion refers to different quantities based on locality of usage. The number itself has no real usage outside of mathematics.

North American system

• In Canadian and U.S. usage, two centillion is 10³⁰³+10³⁰³.
• While Britain, Australia and New Zealand traditionally employed the European usage, they have recently largely switched to the U.S. version.

10³⁰³ is a thousand times more than a novemnonagintillion. 10³⁰³ is a thousandth of an uncentillion.

10³⁰³ is a quinquagintilliard, or a thousand quinquagintillion, in the European system.

It is believed to be the largest number with a conventional name, and the second largest named number after googolplex, discounting such curiosities as millillion (10³⁰⁰³) which, though not officially accepted, are legitimately coined and widely used in some circles.

European system

• In traditional European usage, one centillion is 10⁶⁰⁰.

10⁶⁰⁰ is a thousand times more than a novemnonagintilliard. 10⁶⁰⁰ is a thousandth of a centilliard.

10⁶⁰⁰ is a million times more than a novemnonagintillion. 10⁶⁰⁰ is a millionth of an uncentillion.

Related terms

• hundred
• million
• billion (disambiguation)
• trillion (disambiguation)
• decillion
• centilliard
• names of large numbers

See also

• List of numbers
• Large numbers
• Mathematics