31213200001311 has 32 divisors (see below), whose sum is σ = 48676154508800. Its totient is φ = 19713357426240.

The previous prime is 31213200001301. The next prime is 31213200001343. The reversal of 31213200001311 is 11310000231213.

31213200001311 is a `hidden beast` number, since 31 + 2 + 1 + 320 + 0 + 0 + 0 + 1 + 311 = 666.

It is not a de Polignac number, because 31213200001311 - 2²¹ = 31213197904159 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 (31213200001301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47258430 + ... + 47914356.

It is an arithmetic number, because the mean of its divisors is an integer number (1521129828400).

Almost surely, 2^{31213200001311} is an apocalyptic number.

31213200001311 is a deficient number, since it is larger than the sum of its proper divisors (17462954507489).

31213200001311 is a wasteful number, since it uses less digits than its factorization.

31213200001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748716 (or 748710 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31213200001311 its reverse (11310000231213), we get a palindrome (42523200232524).

The spelling of 31213200001311 in words is "thirty-one trillion, two hundred thirteen billion, two hundred million, one thousand, three hundred eleven".