22123213312 has 80 divisors (see below), whose sum is σ = 46867312800. Its totient is φ = 10403389440.

The previous prime is 22123213309. The next prime is 22123213361. The reversal of 22123213312 is 21331232122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344012 + ... + 1360372.

It is an arithmetic number, because the mean of its divisors is an integer number (585841410).

Almost surely, 2^22123213312 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 22123213312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23433656400).

22123213312 is an abundant number, since it is smaller than the sum of its proper divisors (24744099488).

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

22123213312 is a wasteful number, since it uses less digits than its factorization.

22123213312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16537 (or 16521 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 22123213312 its reverse (21331232122), we get a palindrome (43454445434).

The spelling of 22123213312 in words is "twenty-two billion, one hundred twenty-three million, two hundred thirteen thousand, three hundred twelve".