201221101222 has 16 divisors (see below), whose sum is σ = 326386169280. Its totient is φ = 92677552768.

The previous prime is 201221101181. The next prime is 201221101243. The reversal of 201221101222 is 222101122102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201221101196 and 201221101205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62958697 + ... + 62961892.

It is an arithmetic number, because the mean of its divisors is an integer number (20399135580).

Almost surely, 2^201221101222 is an apocalyptic number.

201221101222 is a deficient number, since it is larger than the sum of its proper divisors (125165068058).

201221101222 is a wasteful number, since it uses less digits than its factorization.

201221101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125920655.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201221101222 its reverse (222101122102), we get a palindrome (423322223324).

The spelling of 201221101222 in words is "two hundred one billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty-two".