31212103023213 has 128 divisors (see below), whose sum is σ = 52917309849600. Its totient is φ = 15944052191232.

The previous prime is 31212103023203. The next prime is 31212103023221. The reversal of 31212103023213 is 31232030121213.

It is not a de Polignac number, because 31212103023213 - 2¹⁶ = 31212102957677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212103023203) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1191788923 + ... + 1191815111.

It is an arithmetic number, because the mean of its divisors is an integer number (413416483200).

Almost surely, 2^{31212103023213} is an apocalyptic number.

It is an amenable number.

31212103023213 is a deficient number, since it is larger than the sum of its proper divisors (21705206826387).

31212103023213 is a wasteful number, since it uses less digits than its factorization.

31212103023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27251.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31212103023213 its reverse (31232030121213), we get a palindrome (62444133144426).

The spelling of 31212103023213 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, twenty-three thousand, two hundred thirteen".