31212033012113 has 16 divisors (see below), whose sum is σ = 33078183840000. Its totient is φ = 29349243301632.

The previous prime is 31212033012109. The next prime is 31212033012157. The reversal of 31212033012113 is 31121033021213.

It is a cyclic number.

It is not a de Polignac number, because 31212033012113 - 2² = 31212033012109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31212033312113) 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, 89912843 + ... + 90259311.

It is an arithmetic number, because the mean of its divisors is an integer number (2067386490000).

Almost surely, 2^{31212033012113} is an apocalyptic number.

It is an amenable number.

31212033012113 is a deficient number, since it is larger than the sum of its proper divisors (1866150827887).

31212033012113 is a wasteful number, since it uses less digits than its factorization.

31212033012113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351304.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31212033012113 its reverse (31121033021213), we get a palindrome (62333066033326).

It can be divided in two parts, 3121203 and 3012113, that added together give a palindrome (6133316).

The spelling of 31212033012113 in words is "thirty-one trillion, two hundred twelve billion, thirty-three million, twelve thousand, one hundred thirteen".