12187899120 has 40 divisors (see below), whose sum is σ = 37782488016. Its totient is φ = 3250106368.

The previous prime is 12187899067. The next prime is 12187899127. The reversal of 12187899120 is 2199878121.

12187899120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 12187899120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187899127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25391217 + ... + 25391696.

Almost surely, 2^12187899120 is an apocalyptic number.

12187899120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12187899120 is an abundant number, since it is smaller than the sum of its proper divisors (25594588896).

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

12187899120 is a wasteful number, since it uses less digits than its factorization.

12187899120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50782929 (or 50782923 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 48.

The spelling of 12187899120 in words is "twelve billion, one hundred eighty-seven million, eight hundred ninety-nine thousand, one hundred twenty".