231222012013 has 4 divisors (see below), whose sum is σ = 232640552128. Its totient is φ = 229803471900.

The previous prime is 231222011987. The next prime is 231222012023. The reversal of 231222012013 is 310210222132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231222012013 - 2³⁷ = 93783058541 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 (231222012023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709269813 + ... + 709270138.

It is an arithmetic number, because the mean of its divisors is an integer number (58160138032).

Almost surely, 2^231222012013 is an apocalyptic number.

It is an amenable number.

231222012013 is a deficient number, since it is larger than the sum of its proper divisors (1418540115).

231222012013 is a wasteful number, since it uses less digits than its factorization.

231222012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418540114.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 231222012013 its reverse (310210222132), we get a palindrome (541432234145).

The spelling of 231222012013 in words is "two hundred thirty-one billion, two hundred twenty-two million, twelve thousand, thirteen".