31312121000311 has 4 divisors (see below), whose sum is σ = 31312132549672. Its totient is φ = 31312109450952.

The previous prime is 31312121000309. The next prime is 31312121000401. The reversal of 31312121000311 is 11300012121313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31312121000311 - 2¹ = 31312121000309 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 (31312121000011) 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, 747640 + ... + 7948786.

It is an arithmetic number, because the mean of its divisors is an integer number (7828033137418).

Almost surely, 2^{31312121000311} is an apocalyptic number.

31312121000311 is a deficient number, since it is larger than the sum of its proper divisors (11549361).

31312121000311 is an equidigital number, since it uses as much as digits as its factorization.

31312121000311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11549360.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31312121000311 its reverse (11300012121313), we get a palindrome (42612133121624).

The spelling of 31312121000311 in words is "thirty-one trillion, three hundred twelve billion, one hundred twenty-one million, three hundred eleven", and thus it is an aban number.