123120125513240 has 128 divisors (see below), whose sum is σ = 306108571392000. Its totient is φ = 44385741849600.

The previous prime is 123120125513239. The next prime is 123120125513327. The reversal of 123120125513240 is 42315521021321.

It is a junction number, because it is equal to n+sod(n) for n = 123120125513197 and 123120125513206.

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, 42896501 + ... + 45676580.

It is an arithmetic number, because the mean of its divisors is an integer number (2391473214000).

Almost surely, 2^{123120125513240} is an apocalyptic number.

123120125513240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123120125513240 is an abundant number, since it is smaller than the sum of its proper divisors (182988445878760).

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

123120125513240 is a wasteful number, since it uses less digits than its factorization.

123120125513240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88573201 (or 88573197 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 123120125513240 its reverse (42315521021321), we get a palindrome (165435646534561).

The spelling of 123120125513240 in words is "one hundred twenty-three trillion, one hundred twenty billion, one hundred twenty-five million, five hundred thirteen thousand, two hundred forty".