222212102221 has 4 divisors (see below), whose sum is σ = 222213797212. Its totient is φ = 222210407232.

The previous prime is 222212102197. The next prime is 222212102239. The reversal of 222212102221 is 122201212222.

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 46660320100 + 175551782121 = 216010^2 + 418989^2 .

It is a cyclic number.

It is not a de Polignac number, because 222212102221 - 2²⁷ = 222077884493 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 (222212102251) 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, 632700 + ... + 919093.

It is an arithmetic number, because the mean of its divisors is an integer number (55553449303).

Almost surely, 2^222212102221 is an apocalyptic number.

It is an amenable number.

222212102221 is a deficient number, since it is larger than the sum of its proper divisors (1694991).

222212102221 is a wasteful number, since it uses less digits than its factorization.

222212102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694990.

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

Adding to 222212102221 its reverse (122201212222), we get a palindrome (344413314443).

The spelling of 222212102221 in words is "two hundred twenty-two billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".