11111100985 has 8 divisors (see below), whose sum is σ = 13333958280. Its totient is φ = 8888456064.

The previous prime is 11111100967. The next prime is 11111100989. The reversal of 11111100985 is 58900111111.

It is a happy number.

11111100985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5496146496 + 5614954489 = 74136^2 + 74933^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111100985 - 2³³ = 2521166393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111100989) 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 in 7 ways as a sum of consecutive naturals, for example, 104589 + ... + 182101.

It is an arithmetic number, because the mean of its divisors is an integer number (1666744785).

Almost surely, 2^11111100985 is an apocalyptic number.

It is an amenable number.

11111100985 is a deficient number, since it is larger than the sum of its proper divisors (2222857295).

11111100985 is an equidigital number, since it uses as much as digits as its factorization.

11111100985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106187.

The product of its (nonzero) digits is 360, while the sum is 28.

The spelling of 11111100985 in words is "eleven billion, one hundred eleven million, one hundred thousand, nine hundred eighty-five".