21,212 in words
21,212
twenty-one thousand two hundred twelve
21,212 is written twenty-one thousand two hundred twelve.
Ways to write it
- As an ordinal
- twenty-one thousand two hundred twelfth
- Expanded form
- 20,000 + 1,000 + 200 + 10 + 2
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 2 | 200 |
| tens | 1 | 10 |
| ones | 2 | 2 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5,303, 10,606 and 21,212 (6 factors)
- First 10 multiples
- 21,212, 42,424, 63,636, 84,848, 106,060, 127,272, 148,484, 169,696, 190,908, 212,120
- Square
- 21,212 × 21,212 = 449,948,944
- Square root
- ≈ 145.64
- Sum of the digits
- 2 + 1 + 2 + 1 + 2 = 8
- Rounded to the nearest 10
- 21,210
- Rounded to the nearest 100
- 21,200
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,211
- Number after
- 21,213
- In binary
101001011011100
Quick check
What number comes just after 21,212?
Show the answer
21,213
Is 21,212 even or odd?
Show the answer
Even
What is 21,212 + 10?
Show the answer
21,222
Practice 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 21,212 in words?
21,212 is written "twenty-one thousand two hundred twelve".
Is 21,212 a prime number?
No. 21,212 is a composite number, because it has more than two factors.
What are the factors of 21,212?
The factors of 21,212 are 1, 2, 4, 5,303, 10,606 and 21,212.