503213123221 has 8 divisors (see below), whose sum is σ = 506471894784. Its totient is φ = 499958375280.

The previous prime is 503213123219. The next prime is 503213123249. The reversal of 503213123221 is 122321312305.

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

It is a cyclic number.

It is not a de Polignac number, because 503213123221 - 2¹ = 503213123219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503213123261) 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, 754765 + ... + 1255426.

It is an arithmetic number, because the mean of its divisors is an integer number (63308986848).

Almost surely, 2^503213123221 is an apocalyptic number.

It is an amenable number.

503213123221 is a deficient number, since it is larger than the sum of its proper divisors (3258771563).

503213123221 is a wasteful number, since it uses less digits than its factorization.

503213123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011811.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 503213123221 its reverse (122321312305), we get a palindrome (625534435526).

The spelling of 503213123221 in words is "five hundred three billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred twenty-one".