3121313013 has 24 divisors (see below), whose sum is σ = 5549002368. Its totient is φ = 1646406432.

The previous prime is 3121313011. The next prime is 3121313053. The reversal of 3121313013 is 3103131213.

It is a happy number.

It is not a de Polignac number, because 3121313013 - 2¹ = 3121313011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121313011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1904745 + ... + 1906382.

It is an arithmetic number, because the mean of its divisors is an integer number (231208432).

Almost surely, 2^3121313013 is an apocalyptic number.

It is an amenable number.

3121313013 is a deficient number, since it is larger than the sum of its proper divisors (2427689355).

3121313013 is a wasteful number, since it uses less digits than its factorization.

3121313013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811153 (or 3811150 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 3121313013 is about 55868.7122905119. The cubic root of 3121313013 is about 1461.4336660113.

Adding to 3121313013 its reverse (3103131213), we get a palindrome (6224444226).

The spelling of 3121313013 in words is "three billion, one hundred twenty-one million, three hundred thirteen thousand, thirteen".