12091209108 has 36 divisors (see below), whose sum is σ = 31010790720. Its totient is φ = 3664002320.

The previous prime is 12091209107. The next prime is 12091209127. The reversal of 12091209108 is 80190219021.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12091209107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4162188 + ... + 4165091.

Almost surely, 2^12091209108 is an apocalyptic number.

It is an amenable number.

12091209108 is an abundant number, since it is smaller than the sum of its proper divisors (18919581612).

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

12091209108 is a wasteful number, since it uses less digits than its factorization.

12091209108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327308 (or 8327295 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 12091209108 in words is "twelve billion, ninety-one million, two hundred nine thousand, one hundred eight".