231231120102 has 48 divisors (see below), whose sum is σ = 513032794560. Its totient is φ = 75234756096.

The previous prime is 231231120089. The next prime is 231231120139. The reversal of 231231120102 is 201021132132.

231231120102 is a `hidden beast` number, since 231 + 2 + 311 + 20 + 102 = 666.

231231120102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50827 + ... + 681942.

It is an arithmetic number, because the mean of its divisors is an integer number (10688183220).

Almost surely, 2^231231120102 is an apocalyptic number.

231231120102 is an abundant number, since it is smaller than the sum of its proper divisors (281801674458).

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

231231120102 is a wasteful number, since it uses less digits than its factorization.

231231120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733197 (or 733194 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231231120102 its reverse (201021132132), we get a palindrome (432252252234).

The spelling of 231231120102 in words is "two hundred thirty-one billion, two hundred thirty-one million, one hundred twenty thousand, one hundred two".