321213233221 has 8 divisors (see below), whose sum is σ = 326386874264. Its totient is φ = 316060496640.

The previous prime is 321213233219. The next prime is 321213233287. The reversal of 321213233221 is 122332312123.

It can be written as a sum of positive squares in 4 ways, for example, as 18526204321 + 302687028900 = 136111^2 + 550170^2 .

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 321213233221 - 2¹ = 321213233219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213236221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5195136 + ... + 5256601.

It is an arithmetic number, because the mean of its divisors is an integer number (40798359283).

Almost surely, 2^321213233221 is an apocalyptic number.

It is an amenable number.

321213233221 is a deficient number, since it is larger than the sum of its proper divisors (5173641043).

321213233221 is a wasteful number, since it uses less digits than its factorization.

321213233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10452231.

The product of its digits is 2592, while the sum is 25.

Adding to 321213233221 its reverse (122332312123), we get a palindrome (443545545344).

The spelling of 321213233221 in words is "three hundred twenty-one billion, two hundred thirteen million, two hundred thirty-three thousand, two hundred twenty-one".