323112221 has 4 divisors (see below), whose sum is σ = 329208732. Its totient is φ = 317015712.

The previous prime is 323112203. The next prime is 323112241. The reversal of 323112221 is 122211323.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122211323 = 13 ⋅9400871.

It can be written as a sum of positive squares in 2 ways, for example, as 152522500 + 170589721 = 12350^2 + 13061^2 .

It is a cyclic number.

It is not a de Polignac number, because 323112221 - 2¹⁴ = 323095837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 323112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323112241) 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 3 ways as a sum of consecutive naturals, for example, 3048176 + ... + 3048281.

It is an arithmetic number, because the mean of its divisors is an integer number (82302183).

Almost surely, 2^323112221 is an apocalyptic number.

It is an amenable number.

323112221 is a deficient number, since it is larger than the sum of its proper divisors (6096511).

323112221 is an equidigital number, since it uses as much as digits as its factorization.

323112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096510.

The product of its digits is 144, while the sum is 17.

The square root of 323112221 is about 17975.3225562158. The cubic root of 323112221 is about 686.2006548660.

Adding to 323112221 its reverse (122211323), we get a palindrome (445323544).

The spelling of 323112221 in words is "three hundred twenty-three million, one hundred twelve thousand, two hundred twenty-one".