111057912905 has 4 divisors (see below), whose sum is σ = 133269495492. Its totient is φ = 88846330320.

The previous prime is 111057912893. The next prime is 111057912937. The reversal of 111057912905 is 509219750111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58082446009 + 52975466896 = 241003^2 + 230164^2 .

It is not a de Polignac number, because 111057912905 - 2⁶ = 111057912841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 11105791286 + ... + 11105791295.

It is an arithmetic number, because the mean of its divisors is an integer number (33317373873).

Almost surely, 2^111057912905 is an apocalyptic number.

It is an amenable number.

111057912905 is a deficient number, since it is larger than the sum of its proper divisors (22211582587).

111057912905 is an equidigital number, since it uses as much as digits as its factorization.

111057912905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22211582586.

The product of its (nonzero) digits is 28350, while the sum is 41.

The spelling of 111057912905 in words is "one hundred eleven billion, fifty-seven million, nine hundred twelve thousand, nine hundred five".