12120189423438 has 16 divisors (see below), whose sum is σ = 24241073454720. Its totient is φ = 4039947373176.

The previous prime is 12120189423413. The next prime is 12120189423449. The reversal of 12120189423438 is 83432498102121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28715020 + ... + 29134047.

It is an arithmetic number, because the mean of its divisors is an integer number (1515067090920).

Almost surely, 2^{12120189423438} is an apocalyptic number.

12120189423438 is an abundant number, since it is smaller than the sum of its proper divisors (12120884031282).

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

12120189423438 is a wasteful number, since it uses less digits than its factorization.

12120189423438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57883991.

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 12120189423438 in words is "twelve trillion, one hundred twenty billion, one hundred eighty-nine million, four hundred twenty-three thousand, four hundred thirty-eight".