21,122 in words
21,122
twenty-one thousand one hundred twenty-two
21,122 is written twenty-one thousand one hundred twenty-two.
Ways to write it
- As an ordinal
- twenty-one thousand one hundred twenty-second
- Expanded form
- 20,000 + 1,000 + 100 + 20 + 2
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 1 | 100 |
| tens | 2 | 20 |
| ones | 2 | 2 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 59, 118, 179, 358, 10,561 and 21,122 (8 factors)
- First 10 multiples
- 21,122, 42,244, 63,366, 84,488, 105,610, 126,732, 147,854, 168,976, 190,098, 211,220
- Square
- 21,122 × 21,122 = 446,138,884
- Square root
- ≈ 145.33
- Sum of the digits
- 2 + 1 + 1 + 2 + 2 = 8
- Rounded to the nearest 10
- 21,120
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,121
- Number after
- 21,123
- In binary
101001010000010
Quick check
What number comes just after 21,122?
Show the answer
21,123
Is 21,122 even or odd?
Show the answer
Even
What is 21,122 + 10?
Show the answer
21,132
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 21,122 in words?
21,122 is written "twenty-one thousand one hundred twenty-two".
Is 21,122 a prime number?
No. 21,122 is a composite number, because it has more than two factors.
What are the factors of 21,122?
The factors of 21,122 are 1, 2, 59, 118, 179, 358, 10,561 and 21,122.