3121311000013 has 4 divisors (see below), whose sum is σ = 3121320323968. Its totient is φ = 3121301676060.

The previous prime is 3121311000011. The next prime is 3121311000019. The reversal of 3121311000013 is 3100001131213.

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 3121311000013 - 2¹ = 3121311000011 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 (3121311000011) 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, 4140381 + ... + 4835842.

It is an arithmetic number, because the mean of its divisors is an integer number (780330080992).

Almost surely, 2^{3121311000013} is an apocalyptic number.

It is an amenable number.

3121311000013 is a deficient number, since it is larger than the sum of its proper divisors (9323955).

3121311000013 is an equidigital number, since it uses as much as digits as its factorization.

3121311000013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323954.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 3121311000013 its reverse (3100001131213), we get a palindrome (6221312131226).

The spelling of 3121311000013 in words is "three trillion, one hundred twenty-one billion, three hundred eleven million, thirteen", and thus it is an aban number.