321213201020 has 24 divisors (see below), whose sum is σ = 674564012304. Its totient is φ = 128482177536.

The previous prime is 321213201017. The next prime is 321213201047. The reversal of 321213201020 is 20102312123.

It is a self number, because there is not a number n which added to its sum of digits gives 321213201020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772379 + ... + 1113101.

It is an arithmetic number, because the mean of its divisors is an integer number (28106833846).

Almost surely, 2^321213201020 is an apocalyptic number.

It is an amenable number.

321213201020 is an abundant number, since it is smaller than the sum of its proper divisors (353350811284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321213201020 is a wasteful number, since it uses less digits than its factorization.

321213201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387869 (or 387867 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 321213201020 its reverse (20102312123), we get a palindrome (341315513143).

The spelling of 321213201020 in words is "three hundred twenty-one billion, two hundred thirteen million, two hundred one thousand, twenty".