222443212221 has 12 divisors (see below), whose sum is σ = 331671600000. Its totient is φ = 143511749640.

The previous prime is 222443212217. The next prime is 222443212267. The reversal of 222443212221 is 122212344222.

222443212221 is a `hidden beast` number, since 2 + 2 + 2 + 4 + 432 + 1 + 2 + 221 = 666.

It is not a de Polignac number, because 222443212221 - 2² = 222443212217 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 (222443212021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 398643471 + ... + 398644028.

It is an arithmetic number, because the mean of its divisors is an integer number (27639300000).

Almost surely, 2^222443212221 is an apocalyptic number.

It is an amenable number.

222443212221 is a deficient number, since it is larger than the sum of its proper divisors (109228387779).

222443212221 is a wasteful number, since it uses less digits than its factorization.

222443212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797287536 (or 797287533 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

Adding to 222443212221 its reverse (122212344222), we get a palindrome (344655556443).

The spelling of 222443212221 in words is "two hundred twenty-two billion, four hundred forty-three million, two hundred twelve thousand, two hundred twenty-one".