20,121 in words
20,121
twenty thousand one hundred and twenty-one
20,121 is written twenty thousand one hundred and twenty-one.
Ways to write it
- As an ordinal
- twenty thousand one hundred and twenty-first
- Expanded form
- 20,000 + 100 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 0 | 0 |
| hundreds | 1 | 100 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 19, 57, 353, 1,059, 6,707 and 20,121 (8 factors)
- First 10 multiples
- 20,121, 40,242, 60,363, 80,484, 100,605, 120,726, 140,847, 160,968, 181,089, 201,210
- Square
- 20,121 × 20,121 = 404,854,641
- Square root
- ≈ 141.85
- Sum of the digits
- 2 + 0 + 1 + 2 + 1 = 6
- Rounded to the nearest 10
- 20,120
- Rounded to the nearest 100
- 20,100
- Rounded to the nearest 1000
- 20,000
- Number before
- 20,120
- Number after
- 20,122
- In binary
100111010011001
Quick check
What number comes just after 20,121?
Show the answer
20,122
Is 20,121 even or odd?
Show the answer
Odd
What is 20,121 + 10?
Show the answer
20,131
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 20,121 in words?
20,121 is written "twenty thousand one hundred and twenty-one".
Is 20,121 a prime number?
No. 20,121 is a composite number, because it has more than two factors.
What are the factors of 20,121?
The factors of 20,121 are 1, 3, 19, 57, 353, 1,059, 6,707 and 20,121.