331204121 has 4 divisors (see below), whose sum is σ = 331305744. Its totient is φ = 331102500.

The previous prime is 331204091. The next prime is 331204147. The reversal of 331204121 is 121402133.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121402133 = 9403 ⋅12911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331204121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331204121.

It is not an unprimeable number, because it can be changed into a prime (331204171) 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, 45755 + ... + 52496.

It is an arithmetic number, because the mean of its divisors is an integer number (82826436).

Almost surely, 2^331204121 is an apocalyptic number.

It is an amenable number.

331204121 is a deficient number, since it is larger than the sum of its proper divisors (101623).

331204121 is an equidigital number, since it uses as much as digits as its factorization.

331204121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101622.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 331204121 is about 18199.0142864937. The cubic root of 331204121 is about 691.8818063866.

Adding to 331204121 its reverse (121402133), we get a palindrome (452606254).

The spelling of 331204121 in words is "three hundred thirty-one million, two hundred four thousand, one hundred twenty-one".