231212113013 has 16 divisors (see below), whose sum is σ = 267284803584. Its totient is φ = 195911291520.

The previous prime is 231212113003. The next prime is 231212113019. The reversal of 231212113013 is 310311212132.

It is a happy number.

It is not a de Polignac number, because 231212113013 - 2²² = 231207918709 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 (231212113019) 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, 223208 + ... + 715713.

It is an arithmetic number, because the mean of its divisors is an integer number (16705300224).

Almost surely, 2^231212113013 is an apocalyptic number.

It is an amenable number.

231212113013 is a deficient number, since it is larger than the sum of its proper divisors (36072690571).

231212113013 is a wasteful number, since it uses less digits than its factorization.

231212113013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939332.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231212113013 its reverse (310311212132), we get a palindrome (541523325145).

The spelling of 231212113013 in words is "two hundred thirty-one billion, two hundred twelve million, one hundred thirteen thousand, thirteen".