222021200201221 has 4 divisors (see below), whose sum is σ = 222025387990252. Its totient is φ = 222017012412192.

The previous prime is 222021200201159. The next prime is 222021200201237. The reversal of 222021200201221 is 122102002120222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131429142705025 + 90592057496196 = 11464255^2 + 9517986^2 .

It is a cyclic number.

It is not a de Polignac number, because 222021200201221 - 2²⁵ = 222021166646789 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 (222021200241221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2093814990 + ... + 2093921023.

It is an arithmetic number, because the mean of its divisors is an integer number (55506346997563).

Almost surely, 2^{222021200201221} is an apocalyptic number.

It is an amenable number.

222021200201221 is a deficient number, since it is larger than the sum of its proper divisors (4187789031).

222021200201221 is an equidigital number, since it uses as much as digits as its factorization.

222021200201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187789030.

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

Adding to 222021200201221 its reverse (122102002120222), we get a palindrome (344123202321443).

The spelling of 222021200201221 in words is "two hundred twenty-two trillion, twenty-one billion, two hundred million, two hundred one thousand, two hundred twenty-one".