110109991909 has 2 divisors, whose sum is σ = 110109991910. Its totient is φ = 110109991908.

The previous prime is 110109991877. The next prime is 110109991921. The reversal of 110109991909 is 909199901011.

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., 110076641284 + 33350625 = 331778^2 + 5775^2 .

It is a cyclic number.

It is not a de Polignac number, because 110109991909 - 2⁵ = 110109991877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110109991009) 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, 55054995954 + 55054995955.

It is an arithmetic number, because the mean of its divisors is an integer number (55054995955).

Almost surely, 2^110109991909 is an apocalyptic number.

It is an amenable number.

110109991909 is a deficient number, since it is larger than the sum of its proper divisors (1).

110109991909 is an equidigital number, since it uses as much as digits as its factorization.

110109991909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59049, while the sum is 49.

The spelling of 110109991909 in words is "one hundred ten billion, one hundred nine million, nine hundred ninety-one thousand, nine hundred nine".