10,821 in words
10,821
ten thousand eight hundred and twenty-one
10,821 is written ten thousand eight hundred and twenty-one.
Ways to write it
- As an ordinal
- ten thousand eight hundred and twenty-first
- Expanded form
- 10,000 + 800 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 1 | 10,000 |
| thousands | 0 | 0 |
| hundreds | 8 | 800 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 3,607 and 10,821 (4 factors)
- First 10 multiples
- 10,821, 21,642, 32,463, 43,284, 54,105, 64,926, 75,747, 86,568, 97,389, 108,210
- Square
- 10,821 × 10,821 = 117,094,041
- Square root
- ≈ 104.02
- Sum of the digits
- 1 + 0 + 8 + 2 + 1 = 12
- Rounded to the nearest 10
- 10,820
- Rounded to the nearest 100
- 10,800
- Rounded to the nearest 1000
- 11,000
- Number before
- 10,820
- Number after
- 10,822
- In binary
10101001000101
Quick check
What number comes just after 10,821?
Show the answer
10,822
Is 10,821 even or odd?
Show the answer
Odd
What is 10,821 + 10?
Show the answer
10,831
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 10,821 in words?
10,821 is written "ten thousand eight hundred and twenty-one".
Is 10,821 a prime number?
No. 10,821 is a composite number, because it has more than two factors.
What are the factors of 10,821?
The factors of 10,821 are 1, 3, 3,607 and 10,821.