11101010100809 has 2 divisors, whose sum is σ = 11101010100810. Its totient is φ = 11101010100808.

The previous prime is 11101010100799. The next prime is 11101010100857. The reversal of 11101010100809 is 90800101010111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6903440953600 + 4197569147209 = 2627440^2 + 2048797^2 .

It is an emirp because it is prime and its reverse (90800101010111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11101010100809 - 2¹² = 11101010096713 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 (11101010100109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550505050404 + 5550505050405.

It is an arithmetic number, because the mean of its divisors is an integer number (5550505050405).

Almost surely, 2^{11101010100809} is an apocalyptic number.

It is an amenable number.

11101010100809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101010100809 is an equidigital number, since it uses as much as digits as its factorization.

11101010100809 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 23.

The spelling of 11101010100809 in words is "eleven trillion, one hundred one billion, ten million, one hundred thousand, eight hundred nine".