3121304031213 has 4 divisors (see below), whose sum is σ = 4161738708288. Its totient is φ = 2080869354140.

The previous prime is 3121304031173. The next prime is 3121304031227.

3121304031213 is nontrivially palindromic in base 10.

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 not a de Polignac number, because 3121304031213 - 2¹⁸ = 3121303769069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121304031233) 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, 520217338533 + ... + 520217338538.

It is an arithmetic number, because the mean of its divisors is an integer number (1040434677072).

Almost surely, 2^{3121304031213} is an apocalyptic number.

It is an amenable number.

3121304031213 is a deficient number, since it is larger than the sum of its proper divisors (1040434677075).

3121304031213 is a wasteful number, since it uses less digits than its factorization.

3121304031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040434677074.

The product of its (nonzero) digits is 1296, while the sum is 24.

The spelling of 3121304031213 in words is "three trillion, one hundred twenty-one billion, three hundred four million, thirty-one thousand, two hundred thirteen".