11123231218 has 32 divisors (see below), whose sum is σ = 19567319040. Its totient is φ = 4687986960.

The previous prime is 11123231209. The next prime is 11123231219. The reversal of 11123231218 is 81213232111.

It is a junction number, because it is equal to n+sod(n) for n = 11123231192 and 11123231201.

It is not an unprimeable number, because it can be changed into a prime (11123231219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263446 + ... + 302737.

It is an arithmetic number, because the mean of its divisors is an integer number (611478720).

Almost surely, 2^11123231218 is an apocalyptic number.

11123231218 is a deficient number, since it is larger than the sum of its proper divisors (8444087822).

11123231218 is a wasteful number, since it uses less digits than its factorization.

11123231218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566262.

The product of its digits is 576, while the sum is 25.

Adding to 11123231218 its reverse (81213232111), we get a palindrome (92336463329).

The spelling of 11123231218 in words is "eleven billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred eighteen".