11223222123 has 4 divisors (see below), whose sum is σ = 14964296168. Its totient is φ = 7482148080.

The previous prime is 11223222107. The next prime is 11223222139. The reversal of 11223222123 is 32122232211.

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

It is an interprime number because it is at equal distance from previous prime (11223222107) and next prime (11223222139).

It is not a de Polignac number, because 11223222123 - 2⁴ = 11223222107 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 11223222123.

It is not an unprimeable number, because it can be changed into a prime (11223242123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870537018 + ... + 1870537023.

It is an arithmetic number, because the mean of its divisors is an integer number (3741074042).

Almost surely, 2^11223222123 is an apocalyptic number.

11223222123 is a deficient number, since it is larger than the sum of its proper divisors (3741074045).

11223222123 is an equidigital number, since it uses as much as digits as its factorization.

11223222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741074044.

The product of its digits is 576, while the sum is 21.

Adding to 11223222123 its reverse (32122232211), we get a palindrome (43345454334).

The spelling of 11223222123 in words is "eleven billion, two hundred twenty-three million, two hundred twenty-two thousand, one hundred twenty-three".