1221
Number 1221: Properties, Factors, and Mathematical Facts
Short answer
The number 1221 is an odd composite number with 8 positive divisors. Its prime factorization is 3 × 11 × 37. It is also a deficient number and a decimal palindrome, which gives it several notable mathematical relationships.
Is 1221 prime?
ClassificationCompositeParityOddDivisor count8AbundanceDeficient
What is the prime factorization of 1221?
Prime factorization
3 times 11 times 37
What are the divisors of 1221?
Divisor count
8
Divisor sum
1,824
Proper divisor sum
603
- 1
- 3
- 11
- 33
- 37
- 111
- 407
- 1221
How is 1221 classified?
How is 1221 represented in other numeral systems?
Decimal
1221
Binary
10011000101
Octal
2305
Hexadecimal
4C5
Roman
MCCXXILearn more →
In words
one thousand two hundred twenty one
Roots and powers
Square root
34.942810 Approximate
Cube root
10.688216 Approximate
Nearest lower square
1156
Nearest higher square
1225
Nearest lower cube
1000
Nearest higher cube
1331
What are the digit properties of 1221?
Which numbers are related to 1221?
Why these results are true
- 1221 is composite because it has positive divisors other than 1 and itself.
Compare this number
FAQ for 1221
- Is 1221 prime?
- No
- What is the prime factorization of 1221?
- 3 × 11 × 37
- Is 1221 a perfect square?
- No
- What is 1221 in binary?
- 10011000101
- What is 1221 in Roman numerals?
- MCCXXI