222100321 has 8 divisors (see below), whose sum is σ = 227914344. Its totient is φ = 216305280.

The previous prime is 222100309. The next prime is 222100331. The reversal of 222100321 is 123001222.

It can be written as a sum of positive squares in 4 ways, for example, as 3651921 + 218448400 = 1911^2 + 14780^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 222100321 - 2⁹ = 222099809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222100331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20715 + ... + 29551.

It is an arithmetic number, because the mean of its divisors is an integer number (28489293).

Almost surely, 2^222100321 is an apocalyptic number.

It is an amenable number.

222100321 is a deficient number, since it is larger than the sum of its proper divisors (5814023).

222100321 is an equidigital number, since it uses as much as digits as its factorization.

222100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 222100321 is about 14903.0305978348. The cubic root of 222100321 is about 605.5960894089.

Adding to 222100321 its reverse (123001222), we get a palindrome (345101543).

Subtracting from 222100321 its reverse (123001222), we obtain a palindrome (99099099).

The spelling of 222100321 in words is "two hundred twenty-two million, one hundred thousand, three hundred twenty-one".