11009191011 has 64 divisors (see below), whose sum is σ = 18590208000. Its totient is φ = 5639279616.

The previous prime is 11009191003. The next prime is 11009191019. The reversal of 11009191011 is 11019190011.

It is an interprime number because it is at equal distance from previous prime (11009191003) and next prime (11009191019).

It is not a de Polignac number, because 11009191011 - 2³ = 11009191003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11009191019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10494415 + ... + 10495463.

It is an arithmetic number, because the mean of its divisors is an integer number (290472000).

Almost surely, 2^11009191011 is an apocalyptic number.

11009191011 is a deficient number, since it is larger than the sum of its proper divisors (7581016989).

11009191011 is a wasteful number, since it uses less digits than its factorization.

11009191011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148.

The product of its (nonzero) digits is 81, while the sum is 24.

It can be divided in two parts, 110091 and 91011, that added together give a palindrome (201102).

The spelling of 11009191011 in words is "eleven billion, nine million, one hundred ninety-one thousand, eleven".