10891199011 has 32 divisors (see below), whose sum is σ = 13866098688. Its totient is φ = 8308707840.

The previous prime is 10891198991. The next prime is 10891199017. The reversal of 10891199011 is 11099119801.

It is a cyclic number.

It is not a de Polignac number, because 10891199011 - 2⁵ = 10891198979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10891199017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 763006 + ... + 777148.

It is an arithmetic number, because the mean of its divisors is an integer number (433315584).

Almost surely, 2^10891199011 is an apocalyptic number.

10891199011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10891199011 is a deficient number, since it is larger than the sum of its proper divisors (2974899677).

10891199011 is a wasteful number, since it uses less digits than its factorization.

10891199011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14371.

The product of its (nonzero) digits is 5832, while the sum is 40.

It can be divided in two parts, 10891 and 199011, that added together give a palindrome (209902).

The spelling of 10891199011 in words is "ten billion, eight hundred ninety-one million, one hundred ninety-nine thousand, eleven".