12221321322 has 64 divisors (see below), whose sum is σ = 29420651520. Its totient is φ = 3306230784.

The previous prime is 12221321309. The next prime is 12221321347. The reversal of 12221321322 is 22312312221.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2194113 + ... + 2199675.

It is an arithmetic number, because the mean of its divisors is an integer number (459697680).

Almost surely, 2^12221321322 is an apocalyptic number.

12221321322 is an abundant number, since it is smaller than the sum of its proper divisors (17199330198).

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

12221321322 is a wasteful number, since it uses less digits than its factorization.

12221321322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8347.

The product of its digits is 576, while the sum is 21.

Adding to 12221321322 its reverse (22312312221), we get a palindrome (34533633543).

The spelling of 12221321322 in words is "twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, three hundred twenty-two".