12108308091 has 16 divisors (see below), whose sum is σ = 17615424000. Its totient is φ = 7336977120.

The previous prime is 12108308059. The next prime is 12108308153. The reversal of 12108308091 is 19080380121.

It is not a de Polignac number, because 12108308091 - 2⁵ = 12108308059 is a prime.

It is a super-2 number, since 2×12108308091² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (12108318091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157806 + ... + 221628.

It is an arithmetic number, because the mean of its divisors is an integer number (1100964000).

Almost surely, 2^12108308091 is an apocalyptic number.

12108308091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12108308091 is a deficient number, since it is larger than the sum of its proper divisors (5507115909).

12108308091 is a wasteful number, since it uses less digits than its factorization.

12108308091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69586.

The product of its (nonzero) digits is 3456, while the sum is 33.

The spelling of 12108308091 in words is "twelve billion, one hundred eight million, three hundred eight thousand, ninety-one".