11191105391 has 2 divisors, whose sum is σ = 11191105392. Its totient is φ = 11191105390.

The previous prime is 11191105381. The next prime is 11191105399. The reversal of 11191105391 is 19350119111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11191105391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11191105399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5595552695 + 5595552696.

It is an arithmetic number, because the mean of its divisors is an integer number (5595552696).

Almost surely, 2^11191105391 is an apocalyptic number.

11191105391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11191105391 is an equidigital number, since it uses as much as digits as its factorization.

11191105391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1215, while the sum is 32.

The spelling of 11191105391 in words is "eleven billion, one hundred ninety-one million, one hundred five thousand, three hundred ninety-one".