222012201221 has 16 divisors (see below), whose sum is σ = 231817614336. Its totient is φ = 212430394176.

The previous prime is 222012201193. The next prime is 222012201239. The reversal of 222012201221 is 122102210222.

It is a happy number.

222012201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 222012201221 - 2¹⁰ = 222012200197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222012201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222012201721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1413596 + ... + 1562778.

It is an arithmetic number, because the mean of its divisors is an integer number (14488600896).

Almost surely, 2^222012201221 is an apocalyptic number.

It is an amenable number.

222012201221 is a deficient number, since it is larger than the sum of its proper divisors (9805413115).

222012201221 is a wasteful number, since it uses less digits than its factorization.

222012201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149932.

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

Adding to 222012201221 its reverse (122102210222), we get a palindrome (344114411443).

Subtracting from 222012201221 its reverse (122102210222), we obtain a palindrome (99909990999).

The spelling of 222012201221 in words is "two hundred twenty-two billion, twelve million, two hundred one thousand, two hundred twenty-one".