123531105323012 has 24 divisors (see below), whose sum is σ = 229272965397504. Its totient is φ = 58036515011712.

The previous prime is 123531105322993. The next prime is 123531105323077. The reversal of 123531105323012 is 210323501135321.

It is a self number, because there is not a number n which added to its sum of digits gives 123531105323012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496362268 + ... + 1496444819.

It is an arithmetic number, because the mean of its divisors is an integer number (9553040224896).

Almost surely, 2^{123531105323012} is an apocalyptic number.

It is an amenable number.

123531105323012 is a deficient number, since it is larger than the sum of its proper divisors (105741860074492).

123531105323012 is a wasteful number, since it uses less digits than its factorization.

123531105323012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992807715 (or 2992807713 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 123531105323012 its reverse (210323501135321), we get a palindrome (333854606458333).

The spelling of 123531105323012 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, one hundred five million, three hundred twenty-three thousand, twelve".