21,117 in words
21,117
twenty-one thousand one hundred seventeen
21,117 is written twenty-one thousand one hundred seventeen.
Ways to write it
- As an ordinal
- twenty-one thousand one hundred seventeenth
- Expanded form
- 20,000 + 1,000 + 100 + 10 + 7
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 1 | 100 |
| tens | 1 | 10 |
| ones | 7 | 7 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 7,039 and 21,117 (4 factors)
- First 10 multiples
- 21,117, 42,234, 63,351, 84,468, 105,585, 126,702, 147,819, 168,936, 190,053, 211,170
- Square
- 21,117 × 21,117 = 445,927,689
- Square root
- ≈ 145.32
- Sum of the digits
- 2 + 1 + 1 + 1 + 7 = 12
- Rounded to the nearest 10
- 21,120
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,116
- Number after
- 21,118
- In binary
101001001111101
Quick check
What number comes just after 21,117?
Show the answer
21,118
Is 21,117 even or odd?
Show the answer
Odd
What is 21,117 + 10?
Show the answer
21,127
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 21,117 in words?
21,117 is written "twenty-one thousand one hundred seventeen".
Is 21,117 a prime number?
No. 21,117 is a composite number, because it has more than two factors.
What are the factors of 21,117?
The factors of 21,117 are 1, 3, 7,039 and 21,117.