500120221 has 2 divisors, whose sum is σ = 500120222. Its totient is φ = 500120220.

The previous prime is 500120209. The next prime is 500120239. The reversal of 500120221 is 122021005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328116996 + 172003225 = 18114^2 + 13115^2 .

It is a cyclic number.

It is not a de Polignac number, because 500120221 - 2⁹ = 500119709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500121221) 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, 250060110 + 250060111.

It is an arithmetic number, because the mean of its divisors is an integer number (250060111).

Almost surely, 2^500120221 is an apocalyptic number.

It is an amenable number.

500120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

500120221 is an equidigital number, since it uses as much as digits as its factorization.

500120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 500120221 is about 22363.3678367101. The cubic root of 500120221 is about 793.7641338670.

Adding to 500120221 its reverse (122021005), we get a palindrome (622141226).

The spelling of 500120221 in words is "five hundred million, one hundred twenty thousand, two hundred twenty-one".