31212311311313 has 4 divisors (see below), whose sum is σ = 34049794157808. Its totient is φ = 28374828464820.

The previous prime is 31212311311301. The next prime is 31212311311339. The reversal of 31212311311313 is 31311311321213.

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 31212311311313 - 2¹⁰ = 31212311310289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31212310311313) 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, 1418741423231 + ... + 1418741423252.

It is an arithmetic number, because the mean of its divisors is an integer number (8512448539452).

Almost surely, 2^{31212311311313} is an apocalyptic number.

It is an amenable number.

31212311311313 is a deficient number, since it is larger than the sum of its proper divisors (2837482846495).

31212311311313 is a wasteful number, since it uses less digits than its factorization.

31212311311313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837482846494.

The product of its digits is 972, while the sum is 26.

Adding to 31212311311313 its reverse (31311311321213), we get a palindrome (62523622632526).

The spelling of 31212311311313 in words is "thirty-one trillion, two hundred twelve billion, three hundred eleven million, three hundred eleven thousand, three hundred thirteen".