12321312222 has 16 divisors (see below), whose sum is σ = 24668493840. Its totient is φ = 4102792512.

The previous prime is 12321312203. The next prime is 12321312229. The reversal of 12321312222 is 22221312321.

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 (12321312229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071697 + ... + 1083132.

It is an arithmetic number, because the mean of its divisors is an integer number (1541780865).

Almost surely, 2^12321312222 is an apocalyptic number.

12321312222 is an abundant number, since it is smaller than the sum of its proper divisors (12347181618).

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

12321312222 is a wasteful number, since it uses less digits than its factorization.

12321312222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155787.

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

Adding to 12321312222 its reverse (22221312321), we get a palindrome (34542624543).

Subtracting 12321312222 from its reverse (22221312321), we obtain a palindrome (9900000099).

The spelling of 12321312222 in words is "twelve billion, three hundred twenty-one million, three hundred twelve thousand, two hundred twenty-two".