231313212212 has 12 divisors (see below), whose sum is σ = 406491839040. Its totient is φ = 115172686776.

The previous prime is 231313212211. The next prime is 231313212217. The reversal of 231313212212 is 212212313132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231313212211) 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, 120978758 + ... + 120980669.

It is an arithmetic number, because the mean of its divisors is an integer number (33874319920).

Almost surely, 2^231313212212 is an apocalyptic number.

It is an amenable number.

231313212212 is a deficient number, since it is larger than the sum of its proper divisors (175178626828).

231313212212 is a wasteful number, since it uses less digits than its factorization.

231313212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241959670 (or 241959668 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 231313212212 its reverse (212212313132), we get a palindrome (443525525344).

The spelling of 231313212212 in words is "two hundred thirty-one billion, three hundred thirteen million, two hundred twelve thousand, two hundred twelve".