504961424221 has 2 divisors, whose sum is σ = 504961424222. Its totient is φ = 504961424220.

The previous prime is 504961424189. The next prime is 504961424239. The reversal of 504961424221 is 122424169405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403161502500 + 101799921721 = 634950^2 + 319061^2 .

It is a cyclic number.

It is not a de Polignac number, because 504961424221 - 2⁵ = 504961424189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504961424021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252480712110 + 252480712111.

It is an arithmetic number, because the mean of its divisors is an integer number (252480712111).

Almost surely, 2^504961424221 is an apocalyptic number.

It is an amenable number.

504961424221 is a deficient number, since it is larger than the sum of its proper divisors (1).

504961424221 is an equidigital number, since it uses as much as digits as its factorization.

504961424221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 504961424221 in words is "five hundred four billion, nine hundred sixty-one million, four hundred twenty-four thousand, two hundred twenty-one".