11105611091 has 2 divisors, whose sum is σ = 11105611092. Its totient is φ = 11105611090.

The previous prime is 11105611057. The next prime is 11105611117. The reversal of 11105611091 is 19011650111.

It is an a-pointer prime, because the next prime (11105611117) can be obtained adding 11105611091 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11105611091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11105611091.

It is not a weakly prime, because it can be changed into another prime (11105611021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5552805545 + 5552805546.

It is an arithmetic number, because the mean of its divisors is an integer number (5552805546).

Almost surely, 2^11105611091 is an apocalyptic number.

11105611091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11105611091 is an equidigital number, since it uses as much as digits as its factorization.

11105611091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 26.

The spelling of 11105611091 in words is "eleven billion, one hundred five million, six hundred eleven thousand, ninety-one".