12117983500 has 96 divisors (see below), whose sum is σ = 31289731200. Its totient is φ = 4011436800.

The previous prime is 12117983489. The next prime is 12117983519. The reversal of 12117983500 is 538971121.

It is a self number, because there is not a number n which added to its sum of digits gives 12117983500.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 41806 + ... + 161194.

It is an arithmetic number, because the mean of its divisors is an integer number (325934700).

Almost surely, 2^12117983500 is an apocalyptic number.

12117983500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12117983500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15644865600).

12117983500 is an abundant number, since it is smaller than the sum of its proper divisors (19171747700).

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

12117983500 is a wasteful number, since it uses less digits than its factorization.

12117983500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119444 (or 119432 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 12117983500 in words is "twelve billion, one hundred seventeen million, nine hundred eighty-three thousand, five hundred".