123112113311020 has 48 divisors (see below), whose sum is σ = 269785397423808. Its totient is φ = 47102143334400.

The previous prime is 123112113311009. The next prime is 123112113311021. The reversal of 123112113311020 is 20113311211321.

It is a junction number, because it is equal to n+sod(n) for n = 123112113310982 and 123112113311000.

It is not an unprimeable number, because it can be changed into a prime (123112113311021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8810320 + ... + 17995720.

It is an arithmetic number, because the mean of its divisors is an integer number (5620529112996).

Almost surely, 2^{123112113311020} is an apocalyptic number.

123112113311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123112113311020 is an abundant number, since it is smaller than the sum of its proper divisors (146673284112788).

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

123112113311020 is a wasteful number, since it uses less digits than its factorization.

123112113311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214570 (or 9214568 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 123112113311020 its reverse (20113311211321), we get a palindrome (143225424522341).

The spelling of 123112113311020 in words is "one hundred twenty-three trillion, one hundred twelve billion, one hundred thirteen million, three hundred eleven thousand, twenty".