11115115009 has 2 divisors, whose sum is σ = 11115115010. Its totient is φ = 11115115008.

The previous prime is 11115115001. The next prime is 11115115031. The reversal of 11115115009 is 90051151111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10609000000 + 506115009 = 103000^2 + 22497^2 .

It is a cyclic number.

It is not a de Polignac number, because 11115115009 - 2³ = 11115115001 is a prime.

It is not a weakly prime, because it can be changed into another prime (11115115001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557557504 + 5557557505.

It is an arithmetic number, because the mean of its divisors is an integer number (5557557505).

Almost surely, 2^11115115009 is an apocalyptic number.

It is an amenable number.

11115115009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115115009 is an equidigital number, since it uses as much as digits as its factorization.

11115115009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 25.

The spelling of 11115115009 in words is "eleven billion, one hundred fifteen million, one hundred fifteen thousand, nine".