31312110021311 has 16 divisors (see below), whose sum is σ = 37925729156160. Its totient is φ = 25236559756800.

The previous prime is 31312110021307. The next prime is 31312110021403. The reversal of 31312110021311 is 11312001121313.

It is not a de Polignac number, because 31312110021311 - 2² = 31312110021307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312118021311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122944340 + ... + 123198761.

It is an arithmetic number, because the mean of its divisors is an integer number (2370358072260).

Almost surely, 2^{31312110021311} is an apocalyptic number.

31312110021311 is a deficient number, since it is larger than the sum of its proper divisors (6613619134849).

31312110021311 is a wasteful number, since it uses less digits than its factorization.

31312110021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246144194.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31312110021311 its reverse (11312001121313), we get a palindrome (42624111142624).

The spelling of 31312110021311 in words is "thirty-one trillion, three hundred twelve billion, one hundred ten million, twenty-one thousand, three hundred eleven".