321000020022 has 128 divisors (see below), whose sum is σ = 714560901120. Its totient is φ = 95324866560.

The previous prime is 321000019993. The next prime is 321000020039. The reversal of 321000020022 is 220020000123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 528830043 + ... + 528830649.

It is an arithmetic number, because the mean of its divisors is an integer number (5582507040).

Almost surely, 2^321000020022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321000020022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357280450560).

321000020022 is an abundant number, since it is smaller than the sum of its proper divisors (393560881098).

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

321000020022 is a wasteful number, since it uses less digits than its factorization.

321000020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 321000020022 its reverse (220020000123), we get a palindrome (541020020145).

The spelling of 321000020022 in words is "three hundred twenty-one billion, twenty thousand, twenty-two".