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12 (number)

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11 12 13
Cardinal twelve
Ordinal 12th
Factorization 22· 3
Roman numeral XII
Greek prefix dodeca-/dodeka-
Latin prefix duodeca-
Binary 11002
Ternary 1103
Quaternary 304
Quinary 225
Senary 206
Octal 148
Duodecimal 1012
Hexadecimal C16
Vigesimal C20
Base 36 C36

Twelve is a number. It comes between eleven and thirteen, and is an even number. It is divisible by 2, 3, 4, and 6. Its ordinal is 12th (twelfth). In Roman numerals, it is written as XII. It is the base of duodecimal numbers.