331120121 has 4 divisors (see below), whose sum is σ = 345516672. Its totient is φ = 316723572.

The previous prime is 331120103. The next prime is 331120151. The reversal of 331120121 is 121021133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331120121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331120096 and 331120105.

It is not an unprimeable number, because it can be changed into a prime (331120151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7198241 + ... + 7198286.

It is an arithmetic number, because the mean of its divisors is an integer number (86379168).

Almost surely, 2^331120121 is an apocalyptic number.

It is an amenable number.

331120121 is a deficient number, since it is larger than the sum of its proper divisors (14396551).

331120121 is a wasteful number, since it uses less digits than its factorization.

331120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14396550.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 331120121 is about 18196.7063228486. The cubic root of 331120121 is about 691.8233097455.

Adding to 331120121 its reverse (121021133), we get a palindrome (452141254).

It can be divided in two parts, 3311 and 20121, that added together give a palindrome (23432).

The spelling of 331120121 in words is "three hundred thirty-one million, one hundred twenty thousand, one hundred twenty-one".