201221221222 has 32 divisors (see below), whose sum is σ = 348986880000. Its totient is φ = 85229504448.

The previous prime is 201221221211. The next prime is 201221221277. The reversal of 201221221222 is 222122122102.

It is a self number, because there is not a number n which added to its sum of digits gives 201221221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2758779 + ... + 2830777.

It is an arithmetic number, because the mean of its divisors is an integer number (10905840000).

Almost surely, 2^201221221222 is an apocalyptic number.

201221221222 is a deficient number, since it is larger than the sum of its proper divisors (147765658778).

201221221222 is a wasteful number, since it uses less digits than its factorization.

201221221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74340.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201221221222 its reverse (222122122102), we get a palindrome (423343343324).

The spelling of 201221221222 in words is "two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".