11111000009999 has 2 divisors, whose sum is σ = 11111000010000. Its totient is φ = 11111000009998.

The previous prime is 11111000009981. The next prime is 11111000010037. The reversal of 11111000009999 is 99990000011111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111000009999 - 2⁴⁰ = 10011488382223 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111000009099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555500004999 + 5555500005000.

It is an arithmetic number, because the mean of its divisors is an integer number (5555500005000).

Almost surely, 2^{11111000009999} is an apocalyptic number.

11111000009999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111000009999 is an equidigital number, since it uses as much as digits as its factorization.

11111000009999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 41.

The spelling of 11111000009999 in words is "eleven trillion, one hundred eleven billion, nine thousand, nine hundred ninety-nine".