12102112091 has 4 divisors (see below), whose sum is σ = 12102402384. Its totient is φ = 12101821800.

The previous prime is 12102112069. The next prime is 12102112151. The reversal of 12102112091 is 19021120121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12102112091 - 2⁶ = 12102112027 is a prime.

It is a super-2 number, since 2×12102112091² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102112021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69455 + ... + 170376.

It is an arithmetic number, because the mean of its divisors is an integer number (3025600596).

Almost surely, 2^12102112091 is an apocalyptic number.

12102112091 is a deficient number, since it is larger than the sum of its proper divisors (290293).

12102112091 is an equidigital number, since it uses as much as digits as its factorization.

12102112091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290292.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12102112091 in words is "twelve billion, one hundred two million, one hundred twelve thousand, ninety-one".