21,230 in words
21,230
twenty-one thousand two hundred thirty
21,230 is written twenty-one thousand two hundred thirty.
Ways to write it
- As an ordinal
- twenty-one thousand two hundred thirtieth
- Expanded form
- 20,000 + 1,000 + 200 + 30
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 2 | 200 |
| tens | 3 | 30 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 5, 10, 11, 22, 55, 110, 193, 386, 965, 1,930, 2,123, 4,246, 10,615 and 21,230 (16 factors)
- First 10 multiples
- 21,230, 42,460, 63,690, 84,920, 106,150, 127,380, 148,610, 169,840, 191,070, 212,300
- Square
- 21,230 × 21,230 = 450,712,900
- Square root
- ≈ 145.71
- Sum of the digits
- 2 + 1 + 2 + 3 + 0 = 8
- Rounded to the nearest 10
- 21,230
- Rounded to the nearest 100
- 21,200
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,229
- Number after
- 21,231
- In binary
101001011101110
Quick check
What number comes just after 21,230?
Show the answer
21,231
Is 21,230 even or odd?
Show the answer
Even
What is 21,230 + 10?
Show the answer
21,240
Practice 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 21,230 in words?
21,230 is written "twenty-one thousand two hundred thirty".
Is 21,230 a prime number?
No. 21,230 is a composite number, because it has more than two factors.
What are the factors of 21,230?
The factors of 21,230 are 1, 2, 5, 10, 11, 22, 55, 110, 193, 386, 965, 1,930, 2,123, 4,246, 10,615 and 21,230.