521410224421 has 2 divisors, whose sum is σ = 521410224422. Its totient is φ = 521410224420.

The previous prime is 521410224389. The next prime is 521410224431. The reversal of 521410224421 is 124422014125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334882116100 + 186528108321 = 578690^2 + 431889^2 .

It is a cyclic number.

It is not a de Polignac number, because 521410224421 - 2⁵ = 521410224389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521410224421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521410224431) 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, 260705112210 + 260705112211.

It is an arithmetic number, because the mean of its divisors is an integer number (260705112211).

Almost surely, 2^521410224421 is an apocalyptic number.

It is an amenable number.

521410224421 is a deficient number, since it is larger than the sum of its proper divisors (1).

521410224421 is an equidigital number, since it uses as much as digits as its factorization.

521410224421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 521410224421 its reverse (124422014125), we get a palindrome (645832238546).

The spelling of 521410224421 in words is "five hundred twenty-one billion, four hundred ten million, two hundred twenty-four thousand, four hundred twenty-one".