121,820 in words
121,820
one hundred twenty-one thousand eight hundred twenty
121,820 is written one hundred twenty-one thousand eight hundred twenty.
Ways to write it
- As an ordinal
- one hundred twenty-one thousand eight hundred twentieth
- Expanded form
- 100,000 + 20,000 + 1,000 + 800 + 20
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 1 | 100,000 |
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 8 | 800 |
| tens | 2 | 20 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 10, 20, 6,091, 12,182, 24,364, 30,455, 60,910 and 121,820 (12 factors)
- First 10 multiples
- 121,820, 243,640, 365,460, 487,280, 609,100, 730,920, 852,740, 974,560, 1,096,380, 1,218,200
- Square
- 121,820 × 121,820 = 14,840,112,400
- Square root
- ≈ 349.03
- Sum of the digits
- 1 + 2 + 1 + 8 + 2 + 0 = 14
- Rounded to the nearest 10
- 121,820
- Rounded to the nearest 100
- 121,800
- Rounded to the nearest 1000
- 122,000
- Number before
- 121,819
- Number after
- 121,821
- In binary
11101101111011100
Quick check
What number comes just after 121,820?
Show the answer
121,821
Is 121,820 even or odd?
Show the answer
Even
What is 121,820 + 10?
Show the answer
121,830
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 121,820 in words?
121,820 is written "one hundred twenty-one thousand eight hundred twenty".
Is 121,820 a prime number?
No. 121,820 is a composite number, because it has more than two factors.
What are the factors of 121,820?
The factors of 121,820 are 1, 2, 4, 5, 10, 20, 6,091, 12,182, 24,364, 30,455, 60,910 and 121,820.