11212320191 has 2 divisors, whose sum is σ = 11212320192. Its totient is φ = 11212320190.

The previous prime is 11212320169. The next prime is 11212320193. The reversal of 11212320191 is 19102321211.

It is a strong prime.

It is an emirp because it is prime and its reverse (19102321211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11212320191 - 2¹⁸ = 11212058047 is a prime.

It is a super-2 number, since 2×11212320191² (a number of 21 digits) contains 22 as substring.

Together with 11212320193, 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 (11212320193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606160095 + 5606160096.

It is an arithmetic number, because the mean of its divisors is an integer number (5606160096).

Almost surely, 2^11212320191 is an apocalyptic number.

11212320191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212320191 is an equidigital number, since it uses as much as digits as its factorization.

11212320191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 11212320191 in words is "eleven billion, two hundred twelve million, three hundred twenty thousand, one hundred ninety-one".