31212103132013 has 32 divisors (see below), whose sum is σ = 33244883913600. Its totient is φ = 29201714970624.

The previous prime is 31212103131973. The next prime is 31212103132031. The reversal of 31212103132013 is 31023130121213.

It is a cyclic number.

It is not a de Polignac number, because 31212103132013 - 2⁶ = 31212103131949 is a prime.

It is a super-3 number, since 3×31212103132013³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212103132013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212103132313) 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, 7988762606 + ... + 7988766512.

It is an arithmetic number, because the mean of its divisors is an integer number (1038902622300).

Almost surely, 2^{31212103132013} is an apocalyptic number.

It is an amenable number.

31212103132013 is a deficient number, since it is larger than the sum of its proper divisors (2032780781587).

31212103132013 is a wasteful number, since it uses less digits than its factorization.

31212103132013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7469.

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

Adding to 31212103132013 its reverse (31023130121213), we get a palindrome (62235233253226).

The spelling of 31212103132013 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred thirty-two thousand, thirteen".