201222102222221 has 8 divisors (see below), whose sum is σ = 201423522844440. Its totient is φ = 201020687086912.

The previous prime is 201222102222203. The next prime is 201222102222227. The reversal of 201222102222221 is 122222201222102.

201222102222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4755064333321 + 196467037888900 = 2180611^2 + 14016670^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201222102222221 - 2⁶ = 201222102222157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222102222227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74086895 + ... + 76754883.

It is an arithmetic number, because the mean of its divisors is an integer number (25177940355555).

Almost surely, 2^{201222102222221} is an apocalyptic number.

It is an amenable number.

201222102222221 is a deficient number, since it is larger than the sum of its proper divisors (201420622219).

201222102222221 is a wasteful number, since it uses less digits than its factorization.

201222102222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743455.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 201222102222221 its reverse (122222201222102), we get a palindrome (323444303444323).

The spelling of 201222102222221 in words is "two hundred one trillion, two hundred twenty-two billion, one hundred two million, two hundred twenty-two thousand, two hundred twenty-one".