201222100222221 has 32 divisors (see below), whose sum is σ = 297531117434880. Its totient is φ = 120176258803200.

The previous prime is 201222100222211. The next prime is 201222100222237. The reversal of 201222100222221 is 122222001222102.

It is not a de Polignac number, because 201222100222221 - 2²⁵ = 201222066667789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222100222201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329125126 + ... + 329735943.

It is an arithmetic number, because the mean of its divisors is an integer number (9297847419840).

Almost surely, 2^{201222100222221} is an apocalyptic number.

It is an amenable number.

201222100222221 is a deficient number, since it is larger than the sum of its proper divisors (96309017212659).

201222100222221 is a wasteful number, since it uses less digits than its factorization.

201222100222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658861317.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 201222100222221 its reverse (122222001222102), we get a palindrome (323444101444323).

The spelling of 201222100222221 in words is "two hundred one trillion, two hundred twenty-two billion, one hundred million, two hundred twenty-two thousand, two hundred twenty-one".