231230031120013 has 4 divisors (see below), whose sum is σ = 233519437368828. Its totient is φ = 228940624871200.

The previous prime is 231230031119897. The next prime is 231230031120019. The reversal of 231230031120013 is 310021130032132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165359487571524 + 65870543548489 = 12859218^2 + 8116067^2 .

It is a cyclic number.

It is not a de Polignac number, because 231230031120013 - 2¹⁷ = 231230030988941 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 (231230031120019) 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, 1144703124256 + ... + 1144703124457.

It is an arithmetic number, because the mean of its divisors is an integer number (58379859342207).

Almost surely, 2^{231230031120013} is an apocalyptic number.

It is an amenable number.

231230031120013 is a deficient number, since it is larger than the sum of its proper divisors (2289406248815).

231230031120013 is a wasteful number, since it uses less digits than its factorization.

231230031120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289406248814.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 231230031120013 its reverse (310021130032132), we get a palindrome (541251161152145).

The spelling of 231230031120013 in words is "two hundred thirty-one trillion, two hundred thirty billion, thirty-one million, one hundred twenty thousand, thirteen".