424044234221 has 2 divisors, whose sum is σ = 424044234222. Its totient is φ = 424044234220.

The previous prime is 424044234181. The next prime is 424044234227. The reversal of 424044234221 is 122432440424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383333101321 + 40711132900 = 619139^2 + 201770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424044234221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424044234227) 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, 212022117110 + 212022117111.

It is an arithmetic number, because the mean of its divisors is an integer number (212022117111).

Almost surely, 2^424044234221 is an apocalyptic number.

It is an amenable number.

424044234221 is a deficient number, since it is larger than the sum of its proper divisors (1).

424044234221 is an equidigital number, since it uses as much as digits as its factorization.

424044234221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 424044234221 its reverse (122432440424), we get a palindrome (546476674645).

The spelling of 424044234221 in words is "four hundred twenty-four billion, forty-four million, two hundred thirty-four thousand, two hundred twenty-one".