11 in words
British English
eleven
Eleven and twelve are the only numbers between ten and twenty that do not end in -teen.
Quick reference
- In figures
- 11
- British English
- eleven
- American English
- The same (why they differ)
- Ordinal
- eleventh (11th)
- Roman numeral
- XI
- Place value
- 1 in the tens column; 1 in the ones column
- Expanded form
- 10 + 1
- Standard form
- 1.1 × 10¹
- Even or odd
- Odd
- Prime factors
- None but itself and one: it is prime
Convert any other number, up to thirty-six digits.