21,213 in words
21,213
twenty-one thousand two hundred thirteen
21,213 is written twenty-one thousand two hundred thirteen.
Ways to write it
- As an ordinal
- twenty-one thousand two hundred thirteenth
- Expanded form
- 20,000 + 1,000 + 200 + 10 + 3
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 2 | 200 |
| tens | 1 | 10 |
| ones | 3 | 3 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 9, 2,357, 7,071 and 21,213 (6 factors)
- First 10 multiples
- 21,213, 42,426, 63,639, 84,852, 106,065, 127,278, 148,491, 169,704, 190,917, 212,130
- Square
- 21,213 × 21,213 = 449,991,369
- Square root
- ≈ 145.65
- Sum of the digits
- 2 + 1 + 2 + 1 + 3 = 9
- Rounded to the nearest 10
- 21,210
- Rounded to the nearest 100
- 21,200
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,212
- Number after
- 21,214
- In binary
101001011011101
Quick check
What number comes just after 21,213?
Show the answer
21,214
Is 21,213 even or odd?
Show the answer
Odd
What is 21,213 + 10?
Show the answer
21,223
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 21,213 in words?
21,213 is written "twenty-one thousand two hundred thirteen".
Is 21,213 a prime number?
No. 21,213 is a composite number, because it has more than two factors.
What are the factors of 21,213?
The factors of 21,213 are 1, 3, 9, 2,357, 7,071 and 21,213.