123121245152120 has 16 divisors (see below), whose sum is σ = 277022801592360. Its totient is φ = 49248498060832.

The previous prime is 123121245152041. The next prime is 123121245152149. The reversal of 123121245152120 is 21251542121321.

It is a happy number.

It is a super-4 number, since 4×123121245152120⁴ (a number of 57 digits) contains 4444 as substring.

It is a congruent number.

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, 1539015564362 + ... + 1539015564441.

Almost surely, 2^{123121245152120} is an apocalyptic number.

123121245152120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123121245152120 is an abundant number, since it is smaller than the sum of its proper divisors (153901556440240).

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

123121245152120 is a wasteful number, since it uses less digits than its factorization.

123121245152120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078031128814 (or 3078031128810 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

Adding to 123121245152120 its reverse (21251542121321), we get a palindrome (144372787273441).

The spelling of 123121245152120 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, two hundred forty-five million, one hundred fifty-two thousand, one hundred twenty".