222132212221 has 2 divisors, whose sum is σ = 222132212222. Its totient is φ = 222132212220.

The previous prime is 222132212131. The next prime is 222132212287. The reversal of 222132212221 is 122212231222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187186022500 + 34946189721 = 432650^2 + 186939^2 .

It is a cyclic number.

It is not a de Polignac number, because 222132212221 - 2¹⁵ = 222132179453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222132212192 and 222132212201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222132212321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111066106110 + 111066106111.

It is an arithmetic number, because the mean of its divisors is an integer number (111066106111).

Almost surely, 2^222132212221 is an apocalyptic number.

It is an amenable number.

222132212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222132212221 is an equidigital number, since it uses as much as digits as its factorization.

222132212221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 22.

Adding to 222132212221 its reverse (122212231222), we get a palindrome (344344443443).

The spelling of 222132212221 in words is "two hundred twenty-two billion, one hundred thirty-two million, two hundred twelve thousand, two hundred twenty-one".