222212212221 has 8 divisors (see below), whose sum is σ = 298271426400. Its totient is φ = 147147236432.

The previous prime is 222212212193. The next prime is 222212212283. The reversal of 222212212221 is 122212212222.

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 222212212221 - 2¹³ = 222212204029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212210221) 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 7 ways as a sum of consecutive naturals, for example, 248559075 + ... + 248559968.

It is an arithmetic number, because the mean of its divisors is an integer number (37283928300).

Almost surely, 2^222212212221 is an apocalyptic number.

It is an amenable number.

222212212221 is a deficient number, since it is larger than the sum of its proper divisors (76059214179).

222212212221 is a wasteful number, since it uses less digits than its factorization.

222212212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497119195.

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

Adding to 222212212221 its reverse (122212212222), we get a palindrome (344424424443).

Subtracting from 222212212221 its reverse (122212212222), we obtain a palindrome (99999999999).

The spelling of 222212212221 in words is "two hundred twenty-two billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".