12105619900 has 72 divisors (see below), whose sum is σ = 29903336064. Its totient is φ = 4210641600.

The previous prime is 12105619873. The next prime is 12105619921. The reversal of 12105619900 is 991650121.

It is a happy number.

12105619900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 213942 + ... + 264541.

It is an arithmetic number, because the mean of its divisors is an integer number (415324112).

Almost surely, 2^12105619900 is an apocalyptic number.

12105619900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12105619900 is an abundant number, since it is smaller than the sum of its proper divisors (17797716164).

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

12105619900 is a wasteful number, since it uses less digits than its factorization.

12105619900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478531 (or 478524 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 34.

The spelling of 12105619900 in words is "twelve billion, one hundred five million, six hundred nineteen thousand, nine hundred".