Square Number — 11² = 121 — free printable diagram

What is 11 squared?

11 squared is 121. Squaring a number means multiplying it by itself, so 11² = 11 × 11 = 121. Read the other way round, the square root of 121 is 11.

Calculation

11² = 11 × 11

Answer

121

In words

one hundred and twenty-one

Square root

√121 = 11

Position

the 11th square number

• Squaring means multiplying a number by itself, so 11² = 11 × 11 = 121.
• 121 is called a square number because 121 counters can be arranged in a perfect square of 11 rows with 11 in each row.
• The opposite of squaring is taking the square root, so √121 = 11.
• 11 squared is not 11 × 2. 11 × 2 = 22, but 11² = 121.
• Each square number is the odd numbers added up in order: 121 − 100 = 21, so the gap from 100 to 121 is 21.