31212100223013 has 16 divisors (see below), whose sum is σ = 41622390656000. Its totient is φ = 20804938593264.

The previous prime is 31212100222997. The next prime is 31212100223021. The reversal of 31212100223013 is 31032200121213.

It is not a de Polignac number, because 31212100223013 - 2⁴ = 31212100222997 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 (31212100223023) 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, 777890370 + ... + 777930492.

It is an arithmetic number, because the mean of its divisors is an integer number (2601399416000).

Almost surely, 2^{31212100223013} is an apocalyptic number.

It is an amenable number.

31212100223013 is a deficient number, since it is larger than the sum of its proper divisors (10410290432987).

31212100223013 is a wasteful number, since it uses less digits than its factorization.

31212100223013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72648.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31212100223013 its reverse (31032200121213), we get a palindrome (62244300344226).

The spelling of 31212100223013 in words is "thirty-one trillion, two hundred twelve billion, one hundred million, two hundred twenty-three thousand, thirteen".