111909302209 has 2 divisors, whose sum is σ = 111909302210. Its totient is φ = 111909302208.

The previous prime is 111909302117. The next prime is 111909302213. The reversal of 111909302209 is 902203909111.

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., 109265285809 + 2644016400 = 330553^2 + 51420^2 .

It is a cyclic number.

It is not a de Polignac number, because 111909302209 - 2⁷ = 111909302081 is a prime.

It is not a weakly prime, because it can be changed into another prime (111909302249) 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, 55954651104 + 55954651105.

It is an arithmetic number, because the mean of its divisors is an integer number (55954651105).

Almost surely, 2^111909302209 is an apocalyptic number.

It is an amenable number.

111909302209 is a deficient number, since it is larger than the sum of its proper divisors (1).

111909302209 is an equidigital number, since it uses as much as digits as its factorization.

111909302209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 111909302209 in words is "one hundred eleven billion, nine hundred nine million, three hundred two thousand, two hundred nine".