21 in Roman Numerals — XXI

21 in Roman Numerals is XXI. Breakdown: X(10) + X(10) + I(1) = XXI. The number 21 is odd.

Conversion

21 = X(10) + X(10) + I(1) = XXI. Roman numerals use 7 symbols: I(1), V(5), X(10), L(50), C(100), D(500), M(1000).

Frequently Asked Questions

What is 21 in Roman Numerals?

21 in Roman Numerals is XXI.

How to write 21 in Roman Numerals?

Break down 21: X(10) + X(10) + I(1) = XXI.