222212221321 has 16 divisors (see below), whose sum is σ = 234330759936. Its totient is φ = 210302078976.

The previous prime is 222212221291. The next prime is 222212221331. The reversal of 222212221321 is 123122212222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 222212221321 - 2¹⁹ = 222211697033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222212221292 and 222212221301.

It is not an unprimeable number, because it can be changed into a prime (222212221331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2690781 + ... + 2772133.

It is an arithmetic number, because the mean of its divisors is an integer number (14645672496).

Almost surely, 2^222212221321 is an apocalyptic number.

It is an amenable number.

222212221321 is a deficient number, since it is larger than the sum of its proper divisors (12118538615).

222212221321 is a wasteful number, since it uses less digits than its factorization.

222212221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82632.

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

Adding to 222212221321 its reverse (123122212222), we get a palindrome (345334433543).

Subtracting from 222212221321 its reverse (123122212222), we obtain a palindrome (99090009099).

The spelling of 222212221321 in words is "two hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, three hundred twenty-one".