3121296931213 has 8 divisors (see below), whose sum is σ = 3124860855480. Its totient is φ = 3117733447680.

The previous prime is 3121296931061. The next prime is 3121296931279. The reversal of 3121296931213 is 3121396921213.

It can be written as a sum of positive squares in 4 ways, for example, as 511644075849 + 2609652855364 = 715293^2 + 1615442^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3121296931213 - 2³³ = 3112706996621 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 3121296931213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121296931513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15283731 + ... + 15486607.

It is an arithmetic number, because the mean of its divisors is an integer number (390607606935).

Almost surely, 2^{3121296931213} is an apocalyptic number.

It is an amenable number.

3121296931213 is a deficient number, since it is larger than the sum of its proper divisors (3563924267).

3121296931213 is a wasteful number, since it uses less digits than its factorization.

3121296931213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220367.

The product of its digits is 104976, while the sum is 43.

The spelling of 3121296931213 in words is "three trillion, one hundred twenty-one billion, two hundred ninety-six million, nine hundred thirty-one thousand, two hundred thirteen".