11012091809 has 2 divisors, whose sum is σ = 11012091810. Its totient is φ = 11012091808.

The previous prime is 11012091781. The next prime is 11012091943. The reversal of 11012091809 is 90819021011.

11012091809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8085606400 + 2926485409 = 89920^2 + 54097^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012091809 - 2²⁴ = 10995314593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11012091109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506045904 + 5506045905.

It is an arithmetic number, because the mean of its divisors is an integer number (5506045905).

Almost surely, 2^11012091809 is an apocalyptic number.

It is an amenable number.

11012091809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012091809 is an equidigital number, since it uses as much as digits as its factorization.

11012091809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 11012091809 in words is "eleven billion, twelve million, ninety-one thousand, eight hundred nine".