321220321422 has 256 divisors, whose sum is σ = 882276433920. Its totient is φ = 75276864000.

The previous prime is 321220321397. The next prime is 321220321463. The reversal of 321220321422 is 224123022123.

It is a junction number, because it is equal to n+sod(n) for n = 321220321392 and 321220321401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 47918523 + ... + 47925225.

It is an arithmetic number, because the mean of its divisors is an integer number (3446392320).

Almost surely, 2^321220321422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321220321422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441138216960).

321220321422 is an abundant number, since it is smaller than the sum of its proper divisors (561056112498).

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

321220321422 is a wasteful number, since it uses less digits than its factorization.

321220321422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6919.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 321220321422 its reverse (224123022123), we get a palindrome (545343343545).

The spelling of 321220321422 in words is "three hundred twenty-one billion, two hundred twenty million, three hundred twenty-one thousand, four hundred twenty-two".