501030012221 has 16 divisors (see below), whose sum is σ = 511445233728. Its totient is φ = 490651324800.

The previous prime is 501030012209. The next prime is 501030012227. The reversal of 501030012221 is 122210030105.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 501030012221 - 2⁶ = 501030012157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 501030012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501030012227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82254386 + ... + 82260476.

It is an arithmetic number, because the mean of its divisors is an integer number (31965327108).

Almost surely, 2^501030012221 is an apocalyptic number.

It is an amenable number.

501030012221 is a deficient number, since it is larger than the sum of its proper divisors (10415221507).

501030012221 is a wasteful number, since it uses less digits than its factorization.

501030012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8812.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 501030012221 its reverse (122210030105), we get a palindrome (623240042326).

The spelling of 501030012221 in words is "five hundred one billion, thirty million, twelve thousand, two hundred twenty-one".