231212312113213 has 4 divisors (see below), whose sum is σ = 231578734161568. Its totient is φ = 230845890064860.

The previous prime is 231212312113193. The next prime is 231212312113217. The reversal of 231212312113213 is 312311213212132.

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 231212312113213 - 2³³ = 231203722178621 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 (231212312113217) 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, 183211023231 + ... + 183211024492.

It is an arithmetic number, because the mean of its divisors is an integer number (57894683540392).

Almost surely, 2^{231212312113213} is an apocalyptic number.

It is an amenable number.

231212312113213 is a deficient number, since it is larger than the sum of its proper divisors (366422048355).

231212312113213 is an equidigital number, since it uses as much as digits as its factorization.

231212312113213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366422048354.

The product of its digits is 2592, while the sum is 28.

Adding to 231212312113213 its reverse (312311213212132), we get a palindrome (543523525325345).

The spelling of 231212312113213 in words is "two hundred thirty-one trillion, two hundred twelve billion, three hundred twelve million, one hundred thirteen thousand, two hundred thirteen".