11111101091 has 2 divisors, whose sum is σ = 11111101092. Its totient is φ = 11111101090.

The previous prime is 11111101069. The next prime is 11111101103. The reversal of 11111101091 is 19010111111.

11111101091 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 also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 16010111111 and 11111101061.

It is a cyclic number.

It is not a de Polignac number, because 11111101091 - 2¹⁰ = 11111100067 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111101061) 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, 5555550545 + 5555550546.

It is an arithmetic number, because the mean of its divisors is an integer number (5555550546).

Almost surely, 2^11111101091 is an apocalyptic number.

11111101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111101091 is an equidigital number, since it uses as much as digits as its factorization.

11111101091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 11111101091 in words is "eleven billion, one hundred eleven million, one hundred one thousand, ninety-one".