Twelve

12 = (2)(6) = (3)(4) = 3² +3 = 2² + 2³ = 3² + 2² - 1² = (36)/(3) = (72)/(6) = 144/12

12 = 3 + 4 + 5 = 1 + 11 = 2 + 10 = 3 + 9 = 4 + 8 = 5 + 7 = 6 + 6 

12 is twice the first perfect number.

12 is the square root of 144

12 items are called dozen. 

12 is 1/12 of a Gross.

12 of 15 Fellow Crafts Recanted.

There are 12 months in a year.

In Binary 12 is represented as 1100. 

In Octal 12 is represented by 14. 

In Hexadecimal it is represented by the letter C.

A cube has 12 edges.

The Sun is at its highest elevation at 12 o'clock, or at High Noon when using Standard Time. 

Jesus Christ had 12 Disciples.

There are 12 Signs of the Zodiac.

There were 12 Tribes of Israel.

There are 12 Jurors used in a trial.

The Knights of the Round Table had 12 Knights.