12211011191 has 2 divisors, whose sum is σ = 12211011192. Its totient is φ = 12211011190.

The previous prime is 12211011149. The next prime is 12211011193. The reversal of 12211011191 is 19111011221.

It is a strong prime.

It is an emirp because it is prime and its reverse (19111011221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211011191 is a prime.

Together with 12211011193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211011193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105505595 + 6105505596.

It is an arithmetic number, because the mean of its divisors is an integer number (6105505596).

Almost surely, 2^12211011191 is an apocalyptic number.

12211011191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211011191 is an equidigital number, since it uses as much as digits as its factorization.

12211011191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 12211011191 in words is "twelve billion, two hundred eleven million, eleven thousand, one hundred ninety-one".