231313312212 has 24 divisors (see below), whose sum is σ = 540360877056. Its totient is φ = 77014463808.

The previous prime is 231313312163. The next prime is 231313312253. The reversal of 231313312212 is 212213313132.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11235988 + ... + 11256555.

It is an arithmetic number, because the mean of its divisors is an integer number (22515036544).

Almost surely, 2^231313312212 is an apocalyptic number.

It is an amenable number.

231313312212 is an abundant number, since it is smaller than the sum of its proper divisors (309047564844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231313312212 is a wasteful number, since it uses less digits than its factorization.

231313312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22493407 (or 22493405 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 231313312212 its reverse (212213313132), we get a palindrome (443526625344).

The spelling of 231313312212 in words is "two hundred thirty-one billion, three hundred thirteen million, three hundred twelve thousand, two hundred twelve".