502421124221 has 2 divisors, whose sum is σ = 502421124222. Its totient is φ = 502421124220.

The previous prime is 502421124203. The next prime is 502421124223. The reversal of 502421124221 is 122421124205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492368856100 + 10052268121 = 701690^2 + 100261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-502421124221 is a prime.

Together with 502421124223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (502421124223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251210562110 + 251210562111.

It is an arithmetic number, because the mean of its divisors is an integer number (251210562111).

Almost surely, 2^502421124221 is an apocalyptic number.

It is an amenable number.

502421124221 is a deficient number, since it is larger than the sum of its proper divisors (1).

502421124221 is an equidigital number, since it uses as much as digits as its factorization.

502421124221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 502421124221 its reverse (122421124205), we get a palindrome (624842248426).

The spelling of 502421124221 in words is "five hundred two billion, four hundred twenty-one million, one hundred twenty-four thousand, two hundred twenty-one".