10911001091 has 4 divisors (see below), whose sum is σ = 10977939912. Its totient is φ = 10844062272.

The previous prime is 10911001063. The next prime is 10911001099. The reversal of 10911001091 is 19010011901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19010011901 = 21937 ⋅866573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10911001091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10911001099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33469166 + ... + 33469491.

It is an arithmetic number, because the mean of its divisors is an integer number (2744484978).

Almost surely, 2^10911001091 is an apocalyptic number.

10911001091 is a deficient number, since it is larger than the sum of its proper divisors (66938821).

10911001091 is an equidigital number, since it uses as much as digits as its factorization.

10911001091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66938820.

The product of its (nonzero) digits is 81, while the sum is 23.

Adding to 10911001091 its reverse (19010011901), we get a palindrome (29921012992).

The spelling of 10911001091 in words is "ten billion, nine hundred eleven million, one thousand, ninety-one".