21,106 in words
21,106
twenty-one thousand one hundred six
21,106 is written twenty-one thousand one hundred six.
Ways to write it
- As an ordinal
- twenty-one thousand one hundred sixth
- Expanded form
- 20,000 + 1,000 + 100 + 6
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 1 | 100 |
| tens | 0 | 0 |
| ones | 6 | 6 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 61, 122, 173, 346, 10,553 and 21,106 (8 factors)
- First 10 multiples
- 21,106, 42,212, 63,318, 84,424, 105,530, 126,636, 147,742, 168,848, 189,954, 211,060
- Square
- 21,106 × 21,106 = 445,463,236
- Square root
- ≈ 145.28
- Sum of the digits
- 2 + 1 + 1 + 0 + 6 = 10
- Rounded to the nearest 10
- 21,110
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,105
- Number after
- 21,107
- In binary
101001001110010
Quick check
What number comes just after 21,106?
Show the answer
21,107
Is 21,106 even or odd?
Show the answer
Even
What is 21,106 + 10?
Show the answer
21,116
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 21,106 in words?
21,106 is written "twenty-one thousand one hundred six".
Is 21,106 a prime number?
No. 21,106 is a composite number, because it has more than two factors.
What are the factors of 21,106?
The factors of 21,106 are 1, 2, 61, 122, 173, 346, 10,553 and 21,106.