11091111011 has 2 divisors, whose sum is σ = 11091111012. Its totient is φ = 11091111010.

The previous prime is 11091111007. The next prime is 11091111013. The reversal of 11091111011 is 11011119011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11091111011 - 2² = 11091111007 is a prime.

Together with 11091111013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11091111013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5545555505 + 5545555506.

It is an arithmetic number, because the mean of its divisors is an integer number (5545555506).

Almost surely, 2^11091111011 is an apocalyptic number.

11091111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11091111011 is an equidigital number, since it uses as much as digits as its factorization.

11091111011 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 17.

The spelling of 11091111011 in words is "eleven billion, ninety-one million, one hundred eleven thousand, eleven".