321213320022 has 96 divisors (see below), whose sum is σ = 755576392032. Its totient is φ = 90761803776.

The previous prime is 321213320011. The next prime is 321213320033. The reversal of 321213320022 is 220023312123.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (321213320011) and next prime (321213320033).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48277648 + ... + 48284300.

It is an arithmetic number, because the mean of its divisors is an integer number (7870587417).

Almost surely, 2^321213320022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321213320022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377788196016).

321213320022 is an abundant number, since it is smaller than the sum of its proper divisors (434363072010).

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

321213320022 is a wasteful number, since it uses less digits than its factorization.

321213320022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8462 (or 8455 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 321213320022 its reverse (220023312123), we get a palindrome (541236632145).

The spelling of 321213320022 in words is "three hundred twenty-one billion, two hundred thirteen million, three hundred twenty thousand, twenty-two".