502552211221 has 2 divisors, whose sum is σ = 502552211222. Its totient is φ = 502552211220.

The previous prime is 502552211191. The next prime is 502552211237. The reversal of 502552211221 is 122112255205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397372640625 + 105179570596 = 630375^2 + 324314^2 .

It is a cyclic number.

It is not a de Polignac number, because 502552211221 - 2¹⁹ = 502551686933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 502552211221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (502552311221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251276105610 + 251276105611.

It is an arithmetic number, because the mean of its divisors is an integer number (251276105611).

Almost surely, 2^502552211221 is an apocalyptic number.

It is an amenable number.

502552211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

502552211221 is an equidigital number, since it uses as much as digits as its factorization.

502552211221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 502552211221 its reverse (122112255205), we get a palindrome (624664466426).

The spelling of 502552211221 in words is "five hundred two billion, five hundred fifty-two million, two hundred eleven thousand, two hundred twenty-one".