11122221223 has 4 divisors (see below), whose sum is σ = 11128180360. Its totient is φ = 11116262088.

The previous prime is 11122221211. The next prime is 11122221247. The reversal of 11122221223 is 32212222111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11122221223 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 11122221223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122221023) 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, 2976768 + ... + 2980501.

It is an arithmetic number, because the mean of its divisors is an integer number (2782045090).

Almost surely, 2^11122221223 is an apocalyptic number.

11122221223 is a deficient number, since it is larger than the sum of its proper divisors (5959137).

11122221223 is an equidigital number, since it uses as much as digits as its factorization.

11122221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959136.

The product of its digits is 192, while the sum is 19.

Adding to 11122221223 its reverse (32212222111), we get a palindrome (43334443334).

The spelling of 11122221223 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-three".