1,21,998 in words
1,21,998
one lakh twenty-one thousand nine hundred and ninety-eight
1,21,998 is written one lakh twenty-one thousand nine hundred and ninety-eight.
Ways to write it
- International system
- one hundred and twenty-one thousand nine hundred and ninety-eight
- Indian system
- one lakh twenty-one thousand nine hundred and ninety-eight
- As an ordinal
- one lakh twenty-one thousand nine hundred and ninety-eighth
- Expanded form
- 1,00,000 + 20,000 + 1,000 + 900 + 90 + 8
Place value
| Place | Digit | Value |
|---|---|---|
| lakhs | 1 | 1,00,000 |
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 9 | 900 |
| tens | 9 | 90 |
| ones | 8 | 8 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 6, 20,333, 40,666, 60,999 and 1,21,998 (8 factors)
- First 10 multiples
- 1,21,998, 2,43,996, 3,65,994, 4,87,992, 6,09,990, 7,31,988, 8,53,986, 9,75,984, 10,97,982, 12,19,980
- Square
- 1,21,998 × 1,21,998 = 14,88,35,12,004
- Square root
- ≈ 349.28
- Sum of the digits
- 1 + 2 + 1 + 9 + 9 + 8 = 30
- Rounded to the nearest 10
- 1,22,000
- Rounded to the nearest 100
- 1,22,000
- Rounded to the nearest 1000
- 1,22,000
- Number before
- 1,21,997
- Number after
- 1,21,999
- In binary
11101110010001110
Quick check
What number comes just after 1,21,998?
Show the answer
1,21,999
Is 1,21,998 even or odd?
Show the answer
Even
What is 1,21,998 + 10?
Show the answer
1,22,008
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 1,21,998 in words?
1,21,998 is written "one lakh twenty-one thousand nine hundred and ninety-eight".
Is 1,21,998 a prime number?
No. 1,21,998 is a composite number, because it has more than two factors.
What are the factors of 1,21,998?
The factors of 1,21,998 are 1, 2, 3, 6, 20,333, 40,666, 60,999 and 1,21,998.