12222321222 has 32 divisors (see below), whose sum is σ = 25297012224. Its totient is φ = 3933727200.

The previous prime is 12222321191. The next prime is 12222321227. The reversal of 12222321222 is 22212322221.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222321227) 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, 181054 + ... + 239217.

It is an arithmetic number, because the mean of its divisors is an integer number (790531632).

Almost surely, 2^12222321222 is an apocalyptic number.

12222321222 is an abundant number, since it is smaller than the sum of its proper divisors (13074691002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12222321222 is a wasteful number, since it uses less digits than its factorization.

12222321222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420444.

The product of its digits is 768, while the sum is 21.

Adding to 12222321222 its reverse (22212322221), we get a palindrome (34434643443).

Subtracting 12222321222 from its reverse (22212322221), we obtain a palindrome (9990000999).

The spelling of 12222321222 in words is "twelve billion, two hundred twenty-two million, three hundred twenty-one thousand, two hundred twenty-two".