21,071 in words
21,071
twenty-one thousand and seventy-one
21,071 is written twenty-one thousand and seventy-one.
Ways to write it
- As an ordinal
- twenty-one thousand and seventy-first
- Expanded form
- 20,000 + 1,000 + 70 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 7 | 70 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 19, 1,109 and 21,071 (4 factors)
- First 10 multiples
- 21,071, 42,142, 63,213, 84,284, 105,355, 126,426, 147,497, 168,568, 189,639, 210,710
- Square
- 21,071 × 21,071 = 443,987,041
- Square root
- ≈ 145.16
- Sum of the digits
- 2 + 1 + 0 + 7 + 1 = 11
- Rounded to the nearest 10
- 21,070
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,070
- Number after
- 21,072
- In binary
101001001001111
Quick check
What number comes just after 21,071?
Show the answer
21,072
Is 21,071 even or odd?
Show the answer
Odd
What is 21,071 + 10?
Show the answer
21,081
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 21,071 in words?
21,071 is written "twenty-one thousand and seventy-one".
Is 21,071 a prime number?
No. 21,071 is a composite number, because it has more than two factors.
What are the factors of 21,071?
The factors of 21,071 are 1, 19, 1,109 and 21,071.