21,220 in words
21,220
twenty-one thousand two hundred twenty
21,220 is written twenty-one thousand two hundred twenty.
Ways to write it
- As an ordinal
- twenty-one thousand two hundred twentieth
- Expanded form
- 20,000 + 1,000 + 200 + 20
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 2 | 200 |
| tens | 2 | 20 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 10, 20, 1,061, 2,122, 4,244, 5,305, 10,610 and 21,220 (12 factors)
- First 10 multiples
- 21,220, 42,440, 63,660, 84,880, 106,100, 127,320, 148,540, 169,760, 190,980, 212,200
- Square
- 21,220 × 21,220 = 450,288,400
- Square root
- ≈ 145.67
- Sum of the digits
- 2 + 1 + 2 + 2 + 0 = 7
- Rounded to the nearest 10
- 21,220
- Rounded to the nearest 100
- 21,200
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,219
- Number after
- 21,221
- In binary
101001011100100
Quick check
What number comes just after 21,220?
Show the answer
21,221
Is 21,220 even or odd?
Show the answer
Even
What is 21,220 + 10?
Show the answer
21,230
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 21,220 in words?
21,220 is written "twenty-one thousand two hundred twenty".
Is 21,220 a prime number?
No. 21,220 is a composite number, because it has more than two factors.
What are the factors of 21,220?
The factors of 21,220 are 1, 2, 4, 5, 10, 20, 1,061, 2,122, 4,244, 5,305, 10,610 and 21,220.