13,121 in words
13,121
thirteen thousand one hundred twenty-one
13,121 is written thirteen thousand one hundred twenty-one.
Ways to write it
- As an ordinal
- thirteen thousand one hundred twenty-first
- Expanded form
- 10,000 + 3,000 + 100 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 1 | 10,000 |
| thousands | 3 | 3,000 |
| hundreds | 1 | 100 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 13,121 (2 factors)
- First 10 multiples
- 13,121, 26,242, 39,363, 52,484, 65,605, 78,726, 91,847, 104,968, 118,089, 131,210
- Square
- 13,121 × 13,121 = 172,160,641
- Square root
- ≈ 114.55
- Sum of the digits
- 1 + 3 + 1 + 2 + 1 = 8
- Rounded to the nearest 10
- 13,120
- Rounded to the nearest 100
- 13,100
- Rounded to the nearest 1000
- 13,000
- Number before
- 13,120
- Number after
- 13,122
- In binary
11001101000001
Quick check
What number comes just after 13,121?
Show the answer
13,122
Is 13,121 even or odd?
Show the answer
Odd
What is 13,121 + 10?
Show the answer
13,131
Practice 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 13,121 in words?
13,121 is written "thirteen thousand one hundred twenty-one".
Is 13,121 a prime number?
Yes. 13,121 is a prime number: its only factors are 1 and 13,121.
What are the factors of 13,121?
The factors of 13,121 are 1 and 13,121.