123100012012120 has 128 divisors (see below), whose sum is σ = 328618990889280. Its totient is φ = 40911171840000.

The previous prime is 123100012012091. The next prime is 123100012012163. The reversal of 123100012012120 is 21210210001321.

It is a super-2 number, since 2×123100012012120² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123100012012094 and 123100012012103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105961791 + ... + 107117230.

Almost surely, 2^{123100012012120} is an apocalyptic number.

123100012012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100012012120 is an abundant number, since it is smaller than the sum of its proper divisors (205518978877160).

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

123100012012120 is a wasteful number, since it uses less digits than its factorization.

123100012012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213079157 (or 213079153 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 123100012012120 its reverse (21210210001321), we get a palindrome (144310222013441).

The spelling of 123100012012120 in words is "one hundred twenty-three trillion, one hundred billion, twelve million, twelve thousand, one hundred twenty".