XI in Roman Numerals

XI is the Roman numeral representation of the number 11.

Roman Numeral Breakdown of XI

To understand how 11 is written as XI in Roman numerals, we must first know the basic Roman numeral symbols:

  • X = 10
  • I = 1

Roman numerals are typically written from largest to smallest from left to right. When a smaller numeral comes after a larger one, you add them together.

XI is formed by:

  • X (10)
  • followed by I (1)

X (10) + I (1) = 11

There is no subtractive notation here, just a simple additive combination.

Decimal to Roman Numeral Converter

Decimal to Roman Numeral Converter

Roman Numeral:

Here are some interesting facts about this number: 11

  1. 11 is the smallest two-digit prime number – a number only divisible by 1 and itself.
  2. It is the fourth prime number after 2, 3, 5, and 7.
  3. 11 is a palindrome, meaning it reads the same forward and backward.
  4. A repeating sequence in math: Multiply 11 by any one-digit number (1–9), and the result is a two-digit number with repeating digits (e.g., 11 × 3 = 33).
  5. There are 11 players on a standard football (soccer) team on the field at a time.
  6. The Apollo 11 mission was the first successful manned moon landing in 1969.
  7. In tarot, the number 11 often symbolizes justice or balance.
  8. The 11th hour is a phrase meaning “the last possible moment.”
  9. 11 is often associated with intuition and spiritual insight in numerology.
  10. November 11th (11/11) is celebrated as Veterans Day in the U.S. and Remembrance Day in many other countries, honoring military service.

Roman Numeral: XI