1,21,920 in words
1,21,920
one lakh twenty-one thousand nine hundred and twenty
1,21,920 is written one lakh twenty-one thousand nine hundred and twenty.
Ways to write it
- International system
- one hundred and twenty-one thousand nine hundred and twenty
- Indian system
- one lakh twenty-one thousand nine hundred and twenty
- As an ordinal
- one lakh twenty-one thousand nine hundred and twentieth
- Expanded form
- 1,00,000 + 20,000 + 1,000 + 900 + 20
Place value
| Place | Digit | Value |
|---|---|---|
| lakhs | 1 | 1,00,000 |
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 9 | 900 |
| tens | 2 | 20 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 56 factors: too many to list
- First 10 multiples
- 1,21,920, 2,43,840, 3,65,760, 4,87,680, 6,09,600, 7,31,520, 8,53,440, 9,75,360, 10,97,280, 12,19,200
- Square
- 1,21,920 × 1,21,920 = 14,86,44,86,400
- Square root
- ≈ 349.17
- Sum of the digits
- 1 + 2 + 1 + 9 + 2 + 0 = 15
- Rounded to the nearest 10
- 1,21,920
- Rounded to the nearest 100
- 1,21,900
- Rounded to the nearest 1000
- 1,22,000
- Number before
- 1,21,919
- Number after
- 1,21,921
- In binary
11101110001000000
Quick check
What number comes just after 1,21,920?
Show the answer
1,21,921
Is 1,21,920 even or odd?
Show the answer
Even
What is 1,21,920 + 10?
Show the answer
1,21,930
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 1,21,920 in words?
1,21,920 is written "one lakh twenty-one thousand nine hundred and twenty".
Is 1,21,920 a prime number?
No. 1,21,920 is a composite number, because it has more than two factors.