72,121 in words
72,121
seventy-two thousand one hundred and twenty-one
72,121 is written seventy-two thousand one hundred and twenty-one.
Ways to write it
- As an ordinal
- seventy-two thousand one hundred and twenty-first
- Expanded form
- 70,000 + 2,000 + 100 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 7 | 70,000 |
| 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, 7, 10,303 and 72,121 (4 factors)
- First 10 multiples
- 72,121, 144,242, 216,363, 288,484, 360,605, 432,726, 504,847, 576,968, 649,089, 721,210
- Square
- 72,121 × 72,121 = 5,201,438,641
- Square root
- ≈ 268.55
- Sum of the digits
- 7 + 2 + 1 + 2 + 1 = 13
- Rounded to the nearest 10
- 72,120
- Rounded to the nearest 100
- 72,100
- Rounded to the nearest 1000
- 72,000
- Number before
- 72,120
- Number after
- 72,122
- In binary
10001100110111001
Quick check
What number comes just after 72,121?
Show the answer
72,122
Is 72,121 even or odd?
Show the answer
Odd
What is 72,121 + 10?
Show the answer
72,131
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 72,121 in words?
72,121 is written "seventy-two thousand one hundred and twenty-one".
Is 72,121 a prime number?
No. 72,121 is a composite number, because it has more than two factors.
What are the factors of 72,121?
The factors of 72,121 are 1, 7, 10,303 and 72,121.