1111012109 has 2 divisors, whose sum is σ = 1111012110. Its totient is φ = 1111012108.

The previous prime is 1111012087. The next prime is 1111012117. The reversal of 1111012109 is 9012101111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 563920009 + 547092100 = 23747^2 + 23390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111012109 - 2²⁸ = 842576653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111012709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555506054 + 555506055.

It is an arithmetic number, because the mean of its divisors is an integer number (555506055).

Almost surely, 2^1111012109 is an apocalyptic number.

It is an amenable number.

1111012109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111012109 is an equidigital number, since it uses as much as digits as its factorization.

1111012109 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 17.

The square root of 1111012109 is about 33331.8482685854. The cubic root of 1111012109 is about 1035.7134054798.

The spelling of 1111012109 in words is "one billion, one hundred eleven million, twelve thousand, one hundred nine".