11011111202191 has 2 divisors, whose sum is σ = 11011111202192. Its totient is φ = 11011111202190.

The previous prime is 11011111202159. The next prime is 11011111202207. The reversal of 11011111202191 is 19120211111011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11011111202191 - 2⁵ = 11011111202159 is a prime.

It is a super-2 number, since 2×11011111202191² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011111202891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505555601095 + 5505555601096.

It is an arithmetic number, because the mean of its divisors is an integer number (5505555601096).

Almost surely, 2^{11011111202191} is an apocalyptic number.

11011111202191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011111202191 is an equidigital number, since it uses as much as digits as its factorization.

11011111202191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 22.

The spelling of 11011111202191 in words is "eleven trillion, eleven billion, one hundred eleven million, two hundred two thousand, one hundred ninety-one".