331220113021 has 4 divisors (see below), whose sum is σ = 378537272032. Its totient is φ = 283902954012.

The previous prime is 331220112989. The next prime is 331220113033. The reversal of 331220113021 is 120311022133.

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: 120311022133 = 17 ⋅7077118949.

It is a cyclic number.

It is not a de Polignac number, because 331220113021 - 2⁵ = 331220112989 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 331220113021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331220110021) 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, 23658579495 + ... + 23658579508.

It is an arithmetic number, because the mean of its divisors is an integer number (94634318008).

Almost surely, 2^331220113021 is an apocalyptic number.

It is an amenable number.

331220113021 is a deficient number, since it is larger than the sum of its proper divisors (47317159011).

331220113021 is an equidigital number, since it uses as much as digits as its factorization.

331220113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47317159010.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 331220113021 its reverse (120311022133), we get a palindrome (451531135154).

The spelling of 331220113021 in words is "three hundred thirty-one billion, two hundred twenty million, one hundred thirteen thousand, twenty-one".