31213001231113 has 12 divisors (see below), whose sum is σ = 33798860203548. Its totient is φ = 28811859148800.

The previous prime is 31213001231059. The next prime is 31213001231117. The reversal of 31213001231113 is 31113210031213.

It can be written as a sum of positive squares in 6 ways, for example, as 19200767169424 + 12012234061689 = 4381868^2 + 3465867^2 .

It is not a de Polignac number, because 31213001231113 - 2⁹ = 31213001230601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213001231117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51306313 + ... + 51911113.

It is an arithmetic number, because the mean of its divisors is an integer number (2816571683629).

Almost surely, 2^{31213001231113} is an apocalyptic number.

It is an amenable number.

31213001231113 is a deficient number, since it is larger than the sum of its proper divisors (2585858972435).

31213001231113 is a wasteful number, since it uses less digits than its factorization.

31213001231113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910204 (or 910191 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31213001231113 its reverse (31113210031213), we get a palindrome (62326211262326).

The spelling of 31213001231113 in words is "thirty-one trillion, two hundred thirteen billion, one million, two hundred thirty-one thousand, one hundred thirteen".