201221201221222 has 96 divisors (see below), whose sum is σ = 380295493768512. Its totient is φ = 77756295022848.

The previous prime is 201221201221213. The next prime is 201221201221241. The reversal of 201221201221222 is 222122102122102.

It is a junction number, because it is equal to n+sod(n) for n = 201221201221193 and 201221201221202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98454588 + ... + 100477600.

It is an arithmetic number, because the mean of its divisors is an integer number (3961411393422).

Almost surely, 2^{201221201221222} is an apocalyptic number.

201221201221222 is a deficient number, since it is larger than the sum of its proper divisors (179074292547290).

201221201221222 is a wasteful number, since it uses less digits than its factorization.

201221201221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023310 (or 2023251 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 201221201221222 its reverse (222122102122102), we get a palindrome (423343303343324).

The spelling of 201221201221222 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-two".