11123113211 has 4 divisors (see below), whose sum is σ = 12712129392. Its totient is φ = 9534097032.

The previous prime is 11123113207. The next prime is 11123113213. The reversal of 11123113211 is 11231132111.

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 11123113211 - 2² = 11123113207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11123113211.

It is not an unprimeable number, because it can be changed into a prime (11123113213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794508080 + ... + 794508093.

It is an arithmetic number, because the mean of its divisors is an integer number (3178032348).

Almost surely, 2^11123113211 is an apocalyptic number.

11123113211 is a deficient number, since it is larger than the sum of its proper divisors (1589016181).

11123113211 is an equidigital number, since it uses as much as digits as its factorization.

11123113211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589016180.

The product of its digits is 36, while the sum is 17.

Adding to 11123113211 its reverse (11231132111), we get a palindrome (22354245322).

The spelling of 11123113211 in words is "eleven billion, one hundred twenty-three million, one hundred thirteen thousand, two hundred eleven".