331020222013 has 4 divisors (see below), whose sum is σ = 356483316028. Its totient is φ = 305557128000.

The previous prime is 331020221969. The next prime is 331020222059. The reversal of 331020222013 is 310222020133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14786073604 + 316234148409 = 121598^2 + 562347^2 .

It is a cyclic number.

It is not a de Polignac number, because 331020222013 - 2²⁹ = 330483351101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331020222913) 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, 12731546988 + ... + 12731547013.

It is an arithmetic number, because the mean of its divisors is an integer number (89120829007).

Almost surely, 2^331020222013 is an apocalyptic number.

It is an amenable number.

331020222013 is a deficient number, since it is larger than the sum of its proper divisors (25463094015).

331020222013 is a wasteful number, since it uses less digits than its factorization.

331020222013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25463094014.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 331020222013 its reverse (310222020133), we get a palindrome (641242242146).

The spelling of 331020222013 in words is "three hundred thirty-one billion, twenty million, two hundred twenty-two thousand, thirteen".