231331322012 has 18 divisors (see below), whose sum is σ = 470924477352. Its totient is φ = 99141995064.

The previous prime is 231331321997. The next prime is 231331322017. The reversal of 231331322012 is 210223133132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231331322017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 590130728 + ... + 590131119.

It is an arithmetic number, because the mean of its divisors is an integer number (26162470964).

Almost surely, 2^231331322012 is an apocalyptic number.

It is an amenable number.

231331322012 is an abundant number, since it is smaller than the sum of its proper divisors (239593155340).

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

231331322012 is a wasteful number, since it uses less digits than its factorization.

231331322012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180261865 (or 1180261856 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 231331322012 its reverse (210223133132), we get a palindrome (441554455144).

The spelling of 231331322012 in words is "two hundred thirty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, twelve".