![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
A prime number has exactly two whole number factors, 1 and itself.
\A composite number has more than two whole number factors.
\Express the number 121 as a product of its factors.
\Write the factors of 121.
\121 = 1 × 121.
\121 = 11 × 11.
\Factors of 15 are 1, 11 and 121.
\Since 121 has more than two factors, it is composite.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The number 121 is a composite number.