321221222 has 16 divisors (see below), whose sum is σ = 583057440. Its totient is φ = 129568128.

The previous prime is 321221221. The next prime is 321221233. The reversal of 321221222 is 222122123.

321221222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 321221222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321221221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674597 + ... + 675072.

It is an arithmetic number, because the mean of its divisors is an integer number (36441090).

Almost surely, 2^321221222 is an apocalyptic number.

321221222 is a deficient number, since it is larger than the sum of its proper divisors (261836218).

321221222 is a wasteful number, since it uses less digits than its factorization.

321221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349695.

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

The square root of 321221222 is about 17922.6455078484. The cubic root of 321221222 is about 684.8593825768.

Adding to 321221222 its reverse (222122123), we get a palindrome (543343345).

Subtracting from 321221222 its reverse (222122123), we obtain a palindrome (99099099).

The spelling of 321221222 in words is "three hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".