320200212221 has 16 divisors (see below), whose sum is σ = 325307982384. Its totient is φ = 315112840704.

The previous prime is 320200212191. The next prime is 320200212229. The reversal of 320200212221 is 122212002023.

It can be written as a sum of positive squares in 8 ways, for example, as 5045971225 + 315154240996 = 71035^2 + 561386^2 .

It is a cyclic number.

It is not a de Polignac number, because 320200212221 - 2²² = 320196017917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320200212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320200212229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77024675 + ... + 77028831.

It is an arithmetic number, because the mean of its divisors is an integer number (20331748899).

Almost surely, 2^320200212221 is an apocalyptic number.

It is an amenable number.

320200212221 is a deficient number, since it is larger than the sum of its proper divisors (5107770163).

320200212221 is a wasteful number, since it uses less digits than its factorization.

320200212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6320.

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

Adding to 320200212221 its reverse (122212002023), we get a palindrome (442412214244).

The spelling of 320200212221 in words is "three hundred twenty billion, two hundred million, two hundred twelve thousand, two hundred twenty-one".