11009999999 has 4 divisors (see below), whose sum is σ = 11036152440. Its totient is φ = 10983847560.

The previous prime is 11009999981. The next prime is 11010000013. The reversal of 11009999999 is 99999990011.

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

It is a cyclic number.

It is not a de Polignac number, because 11009999999 - 2²⁸ = 10741564543 is a prime.

It is a Duffinian number.

11009999999 is a modest number, since divided by 999999 gives 11009 as remainder.

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 (11009998999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13075589 + ... + 13076430.

It is an arithmetic number, because the mean of its divisors is an integer number (2759038110).

Almost surely, 2^11009999999 is an apocalyptic number.

11009999999 is a deficient number, since it is larger than the sum of its proper divisors (26152441).

11009999999 is an equidigital number, since it uses as much as digits as its factorization.

11009999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26152440.

The product of its (nonzero) digits is 4782969, while the sum is 65.

The spelling of 11009999999 in words is "eleven billion, nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".