11011101111091 has 2 divisors, whose sum is σ = 11011101111092. Its totient is φ = 11011101111090.

The previous prime is 11011101111089. The next prime is 11011101111161. The reversal of 11011101111091 is 19011110111011.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19011110111011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11011101111091 - 2¹ = 11011101111089 is a prime.

Together with 11011101111089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11011101111001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505550555545 + 5505550555546.

It is an arithmetic number, because the mean of its divisors is an integer number (5505550555546).

Almost surely, 2^{11011101111091} is an apocalyptic number.

11011101111091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011101111091 is an equidigital number, since it uses as much as digits as its factorization.

11011101111091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 19.

The spelling of 11011101111091 in words is "eleven trillion, eleven billion, one hundred one million, one hundred eleven thousand, ninety-one".