321022222312 has 128 divisors (see below), whose sum is σ = 699354311040. Its totient is φ = 136530042880.

The previous prime is 321022222307. The next prime is 321022222319. The reversal of 321022222312 is 213222220123.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (321022222319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270447783 + ... + 270448969.

It is an arithmetic number, because the mean of its divisors is an integer number (5463705555).

Almost surely, 2^321022222312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321022222312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349677155520).

321022222312 is an abundant number, since it is smaller than the sum of its proper divisors (378332088728).

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

321022222312 is a wasteful number, since it uses less digits than its factorization.

321022222312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 321022222312 its reverse (213222220123), we get a palindrome (534244442435).

The spelling of 321022222312 in words is "three hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, three hundred twelve".