1111111012009 has 2 divisors, whose sum is σ = 1111111012010. Its totient is φ = 1111111012008.

The previous prime is 1111111011973. The next prime is 1111111012019. The reversal of 1111111012009 is 9002101111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756308515600 + 354802496409 = 869660^2 + 595653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111111012009 - 2¹¹ = 1111111009961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111111012019) 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, 555555506004 + 555555506005.

It is an arithmetic number, because the mean of its divisors is an integer number (555555506005).

Almost surely, 2^{1111111012009} is an apocalyptic number.

It is an amenable number.

1111111012009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111111012009 is an equidigital number, since it uses as much as digits as its factorization.

1111111012009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 1111111012009 in words is "one trillion, one hundred eleven billion, one hundred eleven million, twelve thousand, nine".