123111213043012 has 12 divisors (see below), whose sum is σ = 216137370810816. Its totient is φ = 61357678525640.

The previous prime is 123111213042959. The next prime is 123111213043033. The reversal of 123111213043012 is 210340312111321.

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, 49481997568 + ... + 49482000055.

It is an arithmetic number, because the mean of its divisors is an integer number (18011447567568).

Almost surely, 2^{123111213043012} is an apocalyptic number.

It is an amenable number.

123111213043012 is a deficient number, since it is larger than the sum of its proper divisors (93026157767804).

123111213043012 is a wasteful number, since it uses less digits than its factorization.

123111213043012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98963997938 (or 98963997936 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 123111213043012 its reverse (210340312111321), we get a palindrome (333451525154333).

The spelling of 123111213043012 in words is "one hundred twenty-three trillion, one hundred eleven billion, two hundred thirteen million, forty-three thousand, twelve".