11111190091 has 2 divisors, whose sum is σ = 11111190092. Its totient is φ = 11111190090.

The previous prime is 11111190031. The next prime is 11111190113. The reversal of 11111190091 is 19009111111.

11111190091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111190091 - 2¹¹ = 11111188043 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111190031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555595045 + 5555595046.

It is an arithmetic number, because the mean of its divisors is an integer number (5555595046).

Almost surely, 2^11111190091 is an apocalyptic number.

11111190091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111190091 is an equidigital number, since it uses as much as digits as its factorization.

11111190091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 25.

The spelling of 11111190091 in words is "eleven billion, one hundred eleven million, one hundred ninety thousand, ninety-one".