123397188012 has 72 divisors (see below), whose sum is σ = 367980168192. Its totient is φ = 34119036000.

The previous prime is 123397187993. The next prime is 123397188041. The reversal of 123397188012 is 210881793321.

123397188012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×123397188012³ (a number of 34 digits) contains 333 as substring.

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, 7890114 + ... + 7905737.

Almost surely, 2^123397188012 is an apocalyptic number.

123397188012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123397188012 is an abundant number, since it is smaller than the sum of its proper divisors (244582980180).

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

123397188012 is a wasteful number, since it uses less digits than its factorization.

123397188012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15795899 (or 15795894 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 123397188012 in words is "one hundred twenty-three billion, three hundred ninety-seven million, one hundred eighty-eight thousand, twelve".