123551115445120 has 192 divisors, whose sum is σ = 325158640783200. Its totient is φ = 44858220154880.

The previous prime is 123551115445117. The next prime is 123551115445159. The reversal of 123551115445120 is 21544511155321.

123551115445120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48870726 + ... + 51336634.

Almost surely, 2^{123551115445120} is an apocalyptic number.

123551115445120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123551115445120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162579320391600).

123551115445120 is an abundant number, since it is smaller than the sum of its proper divisors (201607525338080).

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

123551115445120 is a wasteful number, since it uses less digits than its factorization.

123551115445120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466597 (or 2466574 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 40.

The spelling of 123551115445120 in words is "one hundred twenty-three trillion, five hundred fifty-one billion, one hundred fifteen million, four hundred forty-five thousand, one hundred twenty".