231011321022012 has 12 divisors (see below), whose sum is σ = 539026415718056. Its totient is φ = 77003773674000.

The previous prime is 231011321021989. The next prime is 231011321022143. The reversal of 231011321022012 is 210220123110132.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 231011321022012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9625471709239 + ... + 9625471709262.

Almost surely, 2^{231011321022012} is an apocalyptic number.

It is an amenable number.

231011321022012 is an abundant number, since it is smaller than the sum of its proper divisors (308015094696044).

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

231011321022012 is a wasteful number, since it uses less digits than its factorization.

231011321022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19250943418508 (or 19250943418506 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 231011321022012 its reverse (210220123110132), we get a palindrome (441231444132144).

The spelling of 231011321022012 in words is "two hundred thirty-one trillion, eleven billion, three hundred twenty-one million, twenty-two thousand, twelve".