322221221 has 4 divisors (see below), whose sum is σ = 368252832. Its totient is φ = 276189612.

The previous prime is 322221199. The next prime is 322221241. The reversal of 322221221 is 122122223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122122223 = 8971 ⋅13613.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-322221221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 322221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (322221241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23015795 + ... + 23015808.

It is an arithmetic number, because the mean of its divisors is an integer number (92063208).

Almost surely, 2^322221221 is an apocalyptic number.

It is an amenable number.

322221221 is a deficient number, since it is larger than the sum of its proper divisors (46031611).

322221221 is an equidigital number, since it uses as much as digits as its factorization.

322221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46031610.

The product of its digits is 192, while the sum is 17.

The square root of 322221221 is about 17950.5214687485. The cubic root of 322221221 is about 685.5693286574.

Adding to 322221221 its reverse (122122223), we get a palindrome (444343444).

The spelling of 322221221 in words is "three hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".