11011100111009 has 2 divisors, whose sum is σ = 11011100111010. Its totient is φ = 11011100111008.

The previous prime is 11011100111003. The next prime is 11011100111071. The reversal of 11011100111009 is 90011100111011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7999122505984 + 3011977605025 = 2828272^2 + 1735505^2 .

It is an emirp because it is prime and its reverse (90011100111011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11011100111009 - 2³² = 11006805143713 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011100111003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505550055504 + 5505550055505.

It is an arithmetic number, because the mean of its divisors is an integer number (5505550055505).

Almost surely, 2^{11011100111009} is an apocalyptic number.

It is an amenable number.

11011100111009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011100111009 is an equidigital number, since it uses as much as digits as its factorization.

11011100111009 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 11011100111009 in words is "eleven trillion, eleven billion, one hundred million, one hundred eleven thousand, nine".