11 in Roman Numerals
11
XI
eleven
How XI is formed
| Place | Value | Symbols |
|---|---|---|
| Tens | 10 | X |
| Units | 1 | I |
| Total | 11 | XI |
XI is written one place at a time, from the largest to the smallest: X (10) + I (1) = 11.
Where you'll see XI
Super Bowl XI was played on January 9, 1977 at Rose Bowl in Pasadena: the Oakland Raiders beat the Minnesota Vikings 32–14.
Some documents write the month in Roman numerals so it isn't confused with the day: XI is November.
The Games of the XI Olympiad were held in Berlin in 1936.
Using XI
As the day of a date, 11 is XI: December 11 is XII.XI written month.day, or XI.XII written day.month. Convert a full date
Numbers near 11
Properties of 11
- Prime factors
- 11
- Divisors
- 1, 11
- Even or odd
- Odd
- Prime number
- Yes
- Letters in XI
- 2
11 is a prime number: it can only be divided by 1 and by itself.
11,000 in Roman numerals
With a bar over it (vinculum), X̅I̅ means 11 × 1,000 = 11,000. How Roman numerals work