12221312312 has 32 divisors (see below), whose sum is σ = 25004490480. Its totient is φ = 5553730560.

The previous prime is 12221312309. The next prime is 12221312351. The reversal of 12221312312 is 21321312221.

12221312312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381758 + ... + 412530.

Almost surely, 2^12221312312 is an apocalyptic number.

It is an amenable number.

12221312312 is an abundant number, since it is smaller than the sum of its proper divisors (12783178168).

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

12221312312 is a wasteful number, since it uses less digits than its factorization.

12221312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35303 (or 35299 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 12221312312 its reverse (21321312221), we get a palindrome (33542624533).

Subtracting 12221312312 from its reverse (21321312221), we obtain a palindrome (9099999909).

The spelling of 12221312312 in words is "twelve billion, two hundred twenty-one million, three hundred twelve thousand, three hundred twelve".