12091055191 has 2 divisors, whose sum is σ = 12091055192. Its totient is φ = 12091055190.

The previous prime is 12091055183. The next prime is 12091055243. The reversal of 12091055191 is 19155019021.

It is a weak prime.

It is an emirp because it is prime and its reverse (19155019021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12091055191 - 2³ = 12091055183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12091058191) 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 as a sum of consecutive naturals, namely, 6045527595 + 6045527596.

It is an arithmetic number, because the mean of its divisors is an integer number (6045527596).

Almost surely, 2^12091055191 is an apocalyptic number.

12091055191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12091055191 is an equidigital number, since it uses as much as digits as its factorization.

12091055191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 34.

The spelling of 12091055191 in words is "twelve billion, ninety-one million, fifty-five thousand, one hundred ninety-one".