21,229 in words
21,229
twenty-one thousand two hundred twenty-nine
21,229 is written twenty-one thousand two hundred twenty-nine.
Ways to write it
- As an ordinal
- twenty-one thousand two hundred twenty-ninth
- Expanded form
- 20,000 + 1,000 + 200 + 20 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 2 | 200 |
| tens | 2 | 20 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 13, 23, 71, 299, 923, 1,633 and 21,229 (8 factors)
- First 10 multiples
- 21,229, 42,458, 63,687, 84,916, 106,145, 127,374, 148,603, 169,832, 191,061, 212,290
- Square
- 21,229 × 21,229 = 450,670,441
- Square root
- ≈ 145.70
- Sum of the digits
- 2 + 1 + 2 + 2 + 9 = 16
- Rounded to the nearest 10
- 21,230
- Rounded to the nearest 100
- 21,200
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,228
- Number after
- 21,230
- In binary
101001011101101
Quick check
What number comes just after 21,229?
Show the answer
21,230
Is 21,229 even or odd?
Show the answer
Odd
What is 21,229 + 10?
Show the answer
21,239
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 21,229 in words?
21,229 is written "twenty-one thousand two hundred twenty-nine".
Is 21,229 a prime number?
No. 21,229 is a composite number, because it has more than two factors.
What are the factors of 21,229?
The factors of 21,229 are 1, 13, 23, 71, 299, 923, 1,633 and 21,229.