21,012 in words
21,012
twenty-one thousand twelve
21,012 is written twenty-one thousand twelve.
Ways to write it
- As an ordinal
- twenty-one thousand twelfth
- Expanded form
- 20,000 + 1,000 + 10 + 2
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 1 | 10 |
| ones | 2 | 2 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 4, 6, 12, 17, 34, 51, 68, 102, 103, 204, 206, 309, 412, 618, 1,236, 1,751, 3,502, 5,253, 7,004, 10,506 and 21,012 (24 factors)
- First 10 multiples
- 21,012, 42,024, 63,036, 84,048, 105,060, 126,072, 147,084, 168,096, 189,108, 210,120
- Square
- 21,012 × 21,012 = 441,504,144
- Square root
- ≈ 144.96
- Sum of the digits
- 2 + 1 + 0 + 1 + 2 = 6
- Rounded to the nearest 10
- 21,010
- Rounded to the nearest 100
- 21,000
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,011
- Number after
- 21,013
- In binary
101001000010100
Quick check
What number comes just after 21,012?
Show the answer
21,013
Is 21,012 even or odd?
Show the answer
Even
What is 21,012 + 10?
Show the answer
21,022
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 21,012 in words?
21,012 is written "twenty-one thousand twelve".
Is 21,012 a prime number?
No. 21,012 is a composite number, because it has more than two factors.
What are the factors of 21,012?
The factors of 21,012 are 1, 2, 3, 4, 6, 12, 17, 34, 51, 68, 102, 103, 204, 206, 309, 412, 618, 1,236, 1,751, 3,502, 5,253, 7,004, 10,506 and 21,012.