12189384279128 has 128 divisors (see below), whose sum is σ = 28461680640000. Its totient is φ = 4881176254080.

The previous prime is 12189384279091. The next prime is 12189384279139. The reversal of 12189384279128 is 82197248398121.

It is a super-3 number, since 3×12189384279128³ (a number of 40 digits) contains 333 as substring.

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, 3776 + ... + 4937487.

It is an arithmetic number, because the mean of its divisors is an integer number (222356880000).

Almost surely, 2^{12189384279128} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12189384279128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14230840320000).

12189384279128 is an abundant number, since it is smaller than the sum of its proper divisors (16272296360872).

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

12189384279128 is a wasteful number, since it uses less digits than its factorization.

12189384279128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941350 (or 4941332 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 65.

The spelling of 12189384279128 in words is "twelve trillion, one hundred eighty-nine billion, three hundred eighty-four million, two hundred seventy-nine thousand, one hundred twenty-eight".