320002422221 has 2 divisors, whose sum is σ = 320002422222. Its totient is φ = 320002422220.

The previous prime is 320002422217. The next prime is 320002422241. The reversal of 320002422221 is 122224200023.

It is an a-pointer prime, because the next prime (320002422241) can be obtained adding 320002422221 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285289515625 + 34712906596 = 534125^2 + 186314^2 .

It is a cyclic number.

It is not a de Polignac number, because 320002422221 - 2² = 320002422217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320002422193 and 320002422202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320002422241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160001211110 + 160001211111.

It is an arithmetic number, because the mean of its divisors is an integer number (160001211111).

Almost surely, 2^320002422221 is an apocalyptic number.

It is an amenable number.

320002422221 is a deficient number, since it is larger than the sum of its proper divisors (1).

320002422221 is an equidigital number, since it uses as much as digits as its factorization.

320002422221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 320002422221 its reverse (122224200023), we get a palindrome (442226622244).

The spelling of 320002422221 in words is "three hundred twenty billion, two million, four hundred twenty-two thousand, two hundred twenty-one".