11091811 has 2 divisors, whose sum is σ = 11091812. Its totient is φ = 11091810.

The previous prime is 11091793. The next prime is 11091827. The reversal of 11091811 is 11819011.

It is a strong prime.

It is an emirp because it is prime and its reverse (11819011) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 11816011 and 11061811.

It is a cyclic number.

It is not a de Polignac number, because 11091811 - 2⁵ = 11091779 is a prime.

It is not a weakly prime, because it can be changed into another prime (11091851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5545905 + 5545906.

It is an arithmetic number, because the mean of its divisors is an integer number (5545906).

Almost surely, 2^11091811 is an apocalyptic number.

11091811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11091811 is an equidigital number, since it uses as much as digits as its factorization.

11091811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The square root of 11091811 is about 3330.4370584054. The cubic root of 11091811 is about 223.0150405106.

The spelling of 11091811 in words is "eleven million, ninety-one thousand, eight hundred eleven".