12210221222 has 4 divisors (see below), whose sum is σ = 18315331836. Its totient is φ = 6105110610.

The previous prime is 12210221201. The next prime is 12210221251. The reversal of 12210221222 is 22212201221.

It is a happy number.

12210221222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12210221222.

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 as a sum of consecutive naturals, namely, 3052555304 + ... + 3052555307.

It is an arithmetic number, because the mean of its divisors is an integer number (4578832959).

Almost surely, 2^12210221222 is an apocalyptic number.

12210221222 is a deficient number, since it is larger than the sum of its proper divisors (6105110614).

12210221222 is an equidigital number, since it uses as much as digits as its factorization.

12210221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105110613.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12210221222 its reverse (22212201221), we get a palindrome (34422422443).

The spelling of 12210221222 in words is "twelve billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty-two".