231230021111213 has 4 divisors (see below), whose sum is σ = 234156983403840. Its totient is φ = 228303058818588.

The previous prime is 231230021111203. The next prime is 231230021111231. The reversal of 231230021111213 is 312111120032132.

It is a happy number.

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 231230021111213 - 2⁴ = 231230021111197 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 (231230021111203) 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, 1463481146195 + ... + 1463481146352.

It is an arithmetic number, because the mean of its divisors is an integer number (58539245850960).

Almost surely, 2^{231230021111213} is an apocalyptic number.

It is an amenable number.

231230021111213 is a deficient number, since it is larger than the sum of its proper divisors (2926962292627).

231230021111213 is an equidigital number, since it uses as much as digits as its factorization.

231230021111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926962292626.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 231230021111213 its reverse (312111120032132), we get a palindrome (543341141143345).

The spelling of 231230021111213 in words is "two hundred thirty-one trillion, two hundred thirty billion, twenty-one million, one hundred eleven thousand, two hundred thirteen".