82506042230021 has 2 divisors, whose sum is σ = 82506042230022. Its totient is φ = 82506042230020.

The previous prime is 82506042230011. The next prime is 82506042230033. The reversal of 82506042230021 is 12003224060528.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80330080917025 + 2175961312996 = 8962705^2 + 1475114^2 .

It is a cyclic number.

It is not a de Polignac number, because 82506042230021 - 2¹⁰ = 82506042228997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82506042230011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41253021115010 + 41253021115011.

It is an arithmetic number, because the mean of its divisors is an integer number (41253021115011).

Almost surely, 2^{82506042230021} is an apocalyptic number.

It is an amenable number.

82506042230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

82506042230021 is an equidigital number, since it uses as much as digits as its factorization.

82506042230021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 82506042230021 its reverse (12003224060528), we get a palindrome (94509266290549).

The spelling of 82506042230021 in words is "eighty-two trillion, five hundred six billion, forty-two million, two hundred thirty thousand, twenty-one".