501320243221 has 16 divisors (see below), whose sum is σ = 604152028800. Its totient is φ = 406371610368.

The previous prime is 501320243197. The next prime is 501320243239. The reversal of 501320243221 is 122342023105.

It is a cyclic number.

It is not a de Polignac number, because 501320243221 - 2⁷ = 501320243093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501320243251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3236560 + ... + 3387913.

It is an arithmetic number, because the mean of its divisors is an integer number (37759501800).

Almost surely, 2^501320243221 is an apocalyptic number.

It is an amenable number.

501320243221 is a deficient number, since it is larger than the sum of its proper divisors (102831785579).

501320243221 is a wasteful number, since it uses less digits than its factorization.

501320243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6625068.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 501320243221 its reverse (122342023105), we get a palindrome (623662266326).

The spelling of 501320243221 in words is "five hundred one billion, three hundred twenty million, two hundred forty-three thousand, two hundred twenty-one".