21,361 in words
21,361
twenty-one thousand three hundred sixty-one
21,361 is written twenty-one thousand three hundred sixty-one.
Ways to write it
- As an ordinal
- twenty-one thousand three hundred sixty-first
- Expanded form
- 20,000 + 1,000 + 300 + 60 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 3 | 300 |
| tens | 6 | 60 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 41, 521 and 21,361 (4 factors)
- First 10 multiples
- 21,361, 42,722, 64,083, 85,444, 106,805, 128,166, 149,527, 170,888, 192,249, 213,610
- Square
- 21,361 × 21,361 = 456,292,321
- Square root
- ≈ 146.15
- Sum of the digits
- 2 + 1 + 3 + 6 + 1 = 13
- Rounded to the nearest 10
- 21,360
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,360
- Number after
- 21,362
- In binary
101001101110001
Quick check
What number comes just after 21,361?
Show the answer
21,362
Is 21,361 even or odd?
Show the answer
Odd
What is 21,361 + 10?
Show the answer
21,371
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 21,361 in words?
21,361 is written "twenty-one thousand three hundred sixty-one".
Is 21,361 a prime number?
No. 21,361 is a composite number, because it has more than two factors.
What are the factors of 21,361?
The factors of 21,361 are 1, 41, 521 and 21,361.