11111000999 has 16 divisors (see below), whose sum is σ = 12789536256. Its totient is φ = 9455378400.

The previous prime is 11111000993. The next prime is 11111001029. The reversal of 11111000999 is 99900011111.

11111000999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11111000999 - 2⁴ = 11111000983 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111000993) 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 15 ways as a sum of consecutive naturals, for example, 1657244 + ... + 1663934.

It is an arithmetic number, because the mean of its divisors is an integer number (799346016).

Almost surely, 2^11111000999 is an apocalyptic number.

11111000999 is a deficient number, since it is larger than the sum of its proper divisors (1678535257).

11111000999 is a wasteful number, since it uses less digits than its factorization.

11111000999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8366.

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 11111000999 in words is "eleven billion, one hundred eleven million, nine hundred ninety-nine", and thus it is an aban number.