11009100091 has 32 divisors (see below), whose sum is σ = 13257271296. Its totient is φ = 9024960000.

The previous prime is 11009100083. The next prime is 11009100107. The reversal of 11009100091 is 19000190011.

It is not a de Polignac number, because 11009100091 - 2³ = 11009100083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11009100001) 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, 576096 + ... + 594898.

It is an arithmetic number, because the mean of its divisors is an integer number (414289728).

Almost surely, 2^11009100091 is an apocalyptic number.

11009100091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11009100091 is a deficient number, since it is larger than the sum of its proper divisors (2248171205).

11009100091 is a wasteful number, since it uses less digits than its factorization.

11009100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18963.

The product of its (nonzero) digits is 81, while the sum is 22.

The spelling of 11009100091 in words is "eleven billion, nine million, one hundred thousand, ninety-one".