222120321 has 8 divisors (see below), whose sum is σ = 296364000. Its totient is φ = 147978432.

The previous prime is 222120313. The next prime is 222120323. The reversal of 222120321 is 123021222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 222120321 - 2³ = 222120313 is a prime.

It is a super-2 number, since 2×222120321² = 98674874002286082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222120321.

It is not an unprimeable number, because it can be changed into a prime (222120323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20200 + ... + 29193.

It is an arithmetic number, because the mean of its divisors is an integer number (37045500).

Almost surely, 2^222120321 is an apocalyptic number.

It is an amenable number.

222120321 is a deficient number, since it is larger than the sum of its proper divisors (74243679).

222120321 is a wasteful number, since it uses less digits than its factorization.

222120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50895.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 222120321 is about 14903.7015871897. The cubic root of 222120321 is about 605.6142667176.

Adding to 222120321 its reverse (123021222), we get a palindrome (345141543).

Subtracting from 222120321 its reverse (123021222), we obtain a palindrome (99099099).

The spelling of 222120321 in words is "two hundred twenty-two million, one hundred twenty thousand, three hundred twenty-one".