231312310102 has 4 divisors (see below), whose sum is σ = 346968465156. Its totient is φ = 115656155050.

The previous prime is 231312310091. The next prime is 231312310123. The reversal of 231312310102 is 201013213132.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×231312310102² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231312310102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57828077524 + ... + 57828077527.

It is an arithmetic number, because the mean of its divisors is an integer number (86742116289).

Almost surely, 2^231312310102 is an apocalyptic number.

231312310102 is a deficient number, since it is larger than the sum of its proper divisors (115656155054).

231312310102 is a wasteful number, since it uses less digits than its factorization.

231312310102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115656155053.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231312310102 its reverse (201013213132), we get a palindrome (432325523234).

The spelling of 231312310102 in words is "two hundred thirty-one billion, three hundred twelve million, three hundred ten thousand, one hundred two".