11111001011009 has 2 divisors, whose sum is σ = 11111001011010. Its totient is φ = 11111001011008.

The previous prime is 11111001010987. The next prime is 11111001011027. The reversal of 11111001011009 is 90011010011111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7515805801009 + 3595195210000 = 2741497^2 + 1896100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111001011009 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111001011059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555500505504 + 5555500505505.

It is an arithmetic number, because the mean of its divisors is an integer number (5555500505505).

Almost surely, 2^{11111001011009} is an apocalyptic number.

It is an amenable number.

11111001011009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111001011009 is an equidigital number, since it uses as much as digits as its factorization.

11111001011009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 11111001011009 in words is "eleven trillion, one hundred eleven billion, one million, eleven thousand, nine".