12128431944999 has 32 divisors (see below), whose sum is σ = 17043696691200. Its totient is φ = 7650466593120.

The previous prime is 12128431944973. The next prime is 12128431945009. The reversal of 12128431944999 is 99944913482121.

It is not a de Polignac number, because 12128431944999 - 2¹¹ = 12128431942951 is a prime.

It is a super-2 number, since 2×12128431944999² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128431944949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165248092 + ... + 165321470.

It is an arithmetic number, because the mean of its divisors is an integer number (532615521600).

Almost surely, 2^{12128431944999} is an apocalyptic number.

12128431944999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12128431944999 is a deficient number, since it is larger than the sum of its proper divisors (4915264746201).

12128431944999 is a wasteful number, since it uses less digits than its factorization.

12128431944999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76995.

The product of its digits is 40310784, while the sum is 66.

The spelling of 12128431944999 in words is "twelve trillion, one hundred twenty-eight billion, four hundred thirty-one million, nine hundred forty-four thousand, nine hundred ninety-nine".