21,108 in words
21,108
twenty-one thousand one hundred eight
21,108 is written twenty-one thousand one hundred eight.
Ways to write it
- As an ordinal
- twenty-one thousand one hundred eighth
- Expanded form
- 20,000 + 1,000 + 100 + 8
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 1 | 100 |
| tens | 0 | 0 |
| ones | 8 | 8 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 4, 6, 12, 1,759, 3,518, 5,277, 7,036, 10,554 and 21,108 (12 factors)
- First 10 multiples
- 21,108, 42,216, 63,324, 84,432, 105,540, 126,648, 147,756, 168,864, 189,972, 211,080
- Square
- 21,108 × 21,108 = 445,547,664
- Square root
- ≈ 145.29
- Sum of the digits
- 2 + 1 + 1 + 0 + 8 = 12
- Rounded to the nearest 10
- 21,110
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,107
- Number after
- 21,109
- In binary
101001001110100
Quick check
What number comes just after 21,108?
Show the answer
21,109
Is 21,108 even or odd?
Show the answer
Even
What is 21,108 + 10?
Show the answer
21,118
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 21,108 in words?
21,108 is written "twenty-one thousand one hundred eight".
Is 21,108 a prime number?
No. 21,108 is a composite number, because it has more than two factors.
What are the factors of 21,108?
The factors of 21,108 are 1, 2, 3, 4, 6, 12, 1,759, 3,518, 5,277, 7,036, 10,554 and 21,108.