503228621161221 has 8 divisors (see below), whose sum is σ = 670984640306400. Its totient is φ = 335479174728432.

The previous prime is 503228621161219. The next prime is 503228621161303. The reversal of 503228621161221 is 122161126822305.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 503228621161221 - 2¹ = 503228621161219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503228621161421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1642999446 + ... + 1643305703.

It is an arithmetic number, because the mean of its divisors is an integer number (83873080038300).

Almost surely, 2^{503228621161221} is an apocalyptic number.

It is an amenable number.

503228621161221 is a deficient number, since it is larger than the sum of its proper divisors (167756019145179).

503228621161221 is a wasteful number, since it uses less digits than its factorization.

503228621161221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286356195.

The product of its (nonzero) digits is 138240, while the sum is 42.

Adding to 503228621161221 its reverse (122161126822305), we get a palindrome (625389747983526).

The spelling of 503228621161221 in words is "five hundred three trillion, two hundred twenty-eight billion, six hundred twenty-one million, one hundred sixty-one thousand, two hundred twenty-one".