11020091111 has 2 divisors, whose sum is σ = 11020091112. Its totient is φ = 11020091110.

The previous prime is 11020091083. The next prime is 11020091171. The reversal of 11020091111 is 11119002011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11020091111 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11020091111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11020091171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510045555 + 5510045556.

It is an arithmetic number, because the mean of its divisors is an integer number (5510045556).

Almost surely, 2^11020091111 is an apocalyptic number.

11020091111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020091111 is an equidigital number, since it uses as much as digits as its factorization.

11020091111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 11020091111 its reverse (11119002011), we get a palindrome (22139093122).

The spelling of 11020091111 in words is "eleven billion, twenty million, ninety-one thousand, one hundred eleven".