21,149 in words
21,149
twenty-one thousand one hundred and forty-nine
21,149 is written twenty-one thousand one hundred and forty-nine.
Ways to write it
- As an ordinal
- twenty-one thousand one hundred and forty-ninth
- Expanded form
- 20,000 + 1,000 + 100 + 40 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 1 | 100 |
| tens | 4 | 40 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 21,149 (2 factors)
- First 10 multiples
- 21,149, 42,298, 63,447, 84,596, 1,05,745, 1,26,894, 1,48,043, 1,69,192, 1,90,341, 2,11,490
- Square
- 21,149 × 21,149 = 44,72,80,201
- Square root
- ≈ 145.43
- Sum of the digits
- 2 + 1 + 1 + 4 + 9 = 17
- Rounded to the nearest 10
- 21,150
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,148
- Number after
- 21,150
- In binary
101001010011101
Quick check
What number comes just after 21,149?
Show the answer
21,150
Is 21,149 even or odd?
Show the answer
Odd
What is 21,149 + 10?
Show the answer
21,159
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
Find the missing number in a sequence.Frequently asked questions
How do you write 21,149 in words?
21,149 is written "twenty-one thousand one hundred and forty-nine".
Is 21,149 a prime number?
Yes. 21,149 is a prime number: its only factors are 1 and 21,149.
What are the factors of 21,149?
The factors of 21,149 are 1 and 21,149.