12105512300 has 36 divisors (see below), whose sum is σ = 30021672240. Its totient is φ = 4150461120.

The previous prime is 12105512299. The next prime is 12105512323. The reversal of 12105512300 is 321550121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8646095 + ... + 8647494.

It is an arithmetic number, because the mean of its divisors is an integer number (833935340).

Almost surely, 2^12105512300 is an apocalyptic number.

12105512300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12105512300 is an abundant number, since it is smaller than the sum of its proper divisors (17916159940).

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

12105512300 is a wasteful number, since it uses less digits than its factorization.

12105512300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17293610 (or 17293603 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The spelling of 12105512300 in words is "twelve billion, one hundred five million, five hundred twelve thousand, three hundred".