82220462221 has 2 divisors, whose sum is σ = 82220462222. Its totient is φ = 82220462220.

The previous prime is 82220462213. The next prime is 82220462297. The reversal of 82220462221 is 12226402228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48669213321 + 33551248900 = 220611^2 + 183170^2 .

It is a cyclic number.

It is not a de Polignac number, because 82220462221 - 2³ = 82220462213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82220462201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41110231110 + 41110231111.

It is an arithmetic number, because the mean of its divisors is an integer number (41110231111).

Almost surely, 2^82220462221 is an apocalyptic number.

It is an amenable number.

82220462221 is a deficient number, since it is larger than the sum of its proper divisors (1).

82220462221 is an equidigital number, since it uses as much as digits as its factorization.

82220462221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 82220462221 its reverse (12226402228), we get a palindrome (94446864449).

The spelling of 82220462221 in words is "eighty-two billion, two hundred twenty million, four hundred sixty-two thousand, two hundred twenty-one".