2,121 in words
2,121
two thousand one hundred twenty-one
2,121 is written two thousand one hundred twenty-one.
Ways to write it
- As an ordinal
- two thousand one hundred twenty-first
- Roman numeral
- MMCXXI
- Expanded form
- 2,000 + 100 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| thousands | 2 | 2,000 |
| hundreds | 1 | 100 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 7, 21, 101, 303, 707 and 2,121 (8 factors)
- First 10 multiples
- 2,121, 4,242, 6,363, 8,484, 10,605, 12,726, 14,847, 16,968, 19,089, 21,210
- Square
- 2,121 × 2,121 = 4,498,641
- Square root
- ≈ 46.05
- Sum of the digits
- 2 + 1 + 2 + 1 = 6
- Rounded to the nearest 10
- 2,120
- Rounded to the nearest 100
- 2,100
- Rounded to the nearest 1000
- 2,000
- Number before
- 2,120
- Number after
- 2,122
- In binary
100001001001
Quick check
What number comes just after 2,121?
Show the answer
2,122
Is 2,121 even or odd?
Show the answer
Odd
What is 2,121 + 10?
Show the answer
2,131
Practice with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Roman Numerals
Read and write Roman numerals from I to 3,999.Frequently asked questions
How do you write 2,121 in words?
2,121 is written "two thousand one hundred twenty-one".
Is 2,121 a prime number?
No. 2,121 is a composite number, because it has more than two factors.
What are the factors of 2,121?
The factors of 2,121 are 1, 3, 7, 21, 101, 303, 707 and 2,121.
How do you write 2,121 in Roman numerals?
2,121 in Roman numerals is MMCXXI.