111110102809 has 2 divisors, whose sum is σ = 111110102810. Its totient is φ = 111110102808.

The previous prime is 111110102801. The next prime is 111110102821. The reversal of 111110102809 is 908201011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95143253209 + 15966849600 = 308453^2 + 126360^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110102809 - 2³ = 111110102801 is a prime.

It is not a weakly prime, because it can be changed into another prime (111110102801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555051404 + 55555051405.

It is an arithmetic number, because the mean of its divisors is an integer number (55555051405).

Almost surely, 2^111110102809 is an apocalyptic number.

It is an amenable number.

111110102809 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110102809 is an equidigital number, since it uses as much as digits as its factorization.

111110102809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 111110102809 in words is "one hundred eleven billion, one hundred ten million, one hundred two thousand, eight hundred nine".