12501398028 has 36 divisors (see below), whose sum is σ = 33932367672. Its totient is φ = 3571827840.

The previous prime is 12501398003. The next prime is 12501398029. The reversal of 12501398028 is 82089310521.

It is not an unprimeable number, because it can be changed into a prime (12501398029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10629853 + ... + 10631028.

Almost surely, 2^12501398028 is an apocalyptic number.

It is an amenable number.

12501398028 is an abundant number, since it is smaller than the sum of its proper divisors (21430969644).

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

12501398028 is a wasteful number, since it uses less digits than its factorization.

12501398028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21260902 (or 21260893 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 12501398028 in words is "twelve billion, five hundred one million, three hundred ninety-eight thousand, twenty-eight".