11111099999 has 16 divisors (see below), whose sum is σ = 11466451584. Its totient is φ = 10760083200.

The previous prime is 11111099897. The next prime is 11111100067. The reversal of 11111099999 is 99999011111.

It is a cyclic number.

It is not a de Polignac number, because 11111099999 - 2²⁰ = 11110051423 is a prime.

It is a Duffinian number.

11111099999 is a modest number, since divided by 99999 gives 11111 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111099099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3253817 + ... + 3257229.

It is an arithmetic number, because the mean of its divisors is an integer number (716653224).

Almost surely, 2^11111099999 is an apocalyptic number.

11111099999 is a deficient number, since it is larger than the sum of its proper divisors (355351585).

11111099999 is a wasteful number, since it uses less digits than its factorization.

11111099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018.

The product of its (nonzero) digits is 59049, while the sum is 50.

The spelling of 11111099999 in words is "eleven billion, one hundred eleven million, ninety-nine thousand, nine hundred ninety-nine".