21,097 in words
21,097
twenty-one thousand and ninety-seven
21,097 is written twenty-one thousand and ninety-seven.
Ways to write it
- As an ordinal
- twenty-one thousand and ninety-seventh
- Expanded form
- 20,000 + 1,000 + 90 + 7
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 9 | 90 |
| ones | 7 | 7 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 17, 73, 289, 1,241 and 21,097 (6 factors)
- First 10 multiples
- 21,097, 42,194, 63,291, 84,388, 105,485, 126,582, 147,679, 168,776, 189,873, 210,970
- Square
- 21,097 × 21,097 = 445,083,409
- Square root
- ≈ 145.25
- Sum of the digits
- 2 + 1 + 0 + 9 + 7 = 19
- Rounded to the nearest 10
- 21,100
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,096
- Number after
- 21,098
- In binary
101001001101001
Quick check
What number comes just after 21,097?
Show the answer
21,098
Is 21,097 even or odd?
Show the answer
Odd
What is 21,097 + 10?
Show the answer
21,107
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 21,097 in words?
21,097 is written "twenty-one thousand and ninety-seven".
Is 21,097 a prime number?
No. 21,097 is a composite number, because it has more than two factors.
What are the factors of 21,097?
The factors of 21,097 are 1, 17, 73, 289, 1,241 and 21,097.