10990109911 has 4 divisors (see below), whose sum is σ = 11989210824. Its totient is φ = 9991009000.

The previous prime is 10990109873. The next prime is 10990109953. The reversal of 10990109911 is 11990109901.

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 10990109911 - 2⁷ = 10990109783 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10990100911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499550440 + ... + 499550461.

It is an arithmetic number, because the mean of its divisors is an integer number (2997302706).

Almost surely, 2^10990109911 is an apocalyptic number.

10990109911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10990109911 is a deficient number, since it is larger than the sum of its proper divisors (999100913).

10990109911 is an equidigital number, since it uses as much as digits as its factorization.

10990109911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999100912.

The product of its (nonzero) digits is 6561, while the sum is 40.

The spelling of 10990109911 in words is "ten billion, nine hundred ninety million, one hundred nine thousand, nine hundred eleven".