442421221241 has 2 divisors, whose sum is σ = 442421221242. Its totient is φ = 442421221240.

The previous prime is 442421221169. The next prime is 442421221267. The reversal of 442421221241 is 142122124244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419929920400 + 22491300841 = 648020^2 + 149971^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442421221241 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (442421221271) 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 as a sum of consecutive naturals, namely, 221210610620 + 221210610621.

It is an arithmetic number, because the mean of its divisors is an integer number (221210610621).

Almost surely, 2^442421221241 is an apocalyptic number.

It is an amenable number.

442421221241 is a deficient number, since it is larger than the sum of its proper divisors (1).

442421221241 is an equidigital number, since it uses as much as digits as its factorization.

442421221241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8192, while the sum is 29.

Adding to 442421221241 its reverse (142122124244), we get a palindrome (584543345485).

The spelling of 442421221241 in words is "four hundred forty-two billion, four hundred twenty-one million, two hundred twenty-one thousand, two hundred forty-one".