121321131 has 8 divisors (see below), whose sum is σ = 164413584. Its totient is φ = 79554720.

The previous prime is 121321127. The next prime is 121321133. The reversal of 121321131 is 131123121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121321131 - 2² = 121321127 is a prime.

It is a super-2 number, since 2×121321131² = 29437633654238322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121321131.

It is not an unprimeable number, because it can be changed into a prime (121321133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331296 + ... + 331661.

It is an arithmetic number, because the mean of its divisors is an integer number (20551698).

Almost surely, 2^121321131 is an apocalyptic number.

121321131 is a deficient number, since it is larger than the sum of its proper divisors (43092453).

121321131 is an equidigital number, since it uses as much as digits as its factorization.

121321131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663021.

The product of its digits is 36, while the sum is 15.

The square root of 121321131 is about 11014.5871915383. The cubic root of 121321131 is about 495.0459175851.

Adding to 121321131 its reverse (131123121), we get a palindrome (252444252).

The spelling of 121321131 in words is "one hundred twenty-one million, three hundred twenty-one thousand, one hundred thirty-one".