12 (number)

← 11 12 13 →
← 10 11 12 13 14 15 16 17 18 19 → List of numbers — Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	twelve
Ordinal	12th (twelfth)
Factorization	22× 3
Greek numeral	ΙΒ´
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

This article is about the number twelve. For the year, see 12.

Twelve is a number. It comes between eleven and thirteen, and it is an even number. It is divisible by 1, 2, 3, 4, 6, and 12. Its ordinal is 12th (twelfth). In Roman numerals, it is written as XII. It is the base of duodecimal numbers.

Mathematics

• Twelve is the first abundant number.