22124322012 has 144 divisors (see below), whose sum is σ = 58547397888. Its totient is φ = 6487303680.

The previous prime is 22124322007. The next prime is 22124322047. The reversal of 22124322012 is 21022342122.

It is a self number, because there is not a number n which added to its sum of digits gives 22124322012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15438448 + ... + 15439880.

It is an arithmetic number, because the mean of its divisors is an integer number (406579152).

Almost surely, 2^22124322012 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 22124322012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29273698944).

22124322012 is an abundant number, since it is smaller than the sum of its proper divisors (36423075876).

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

22124322012 is a wasteful number, since it uses less digits than its factorization.

22124322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22124322012 its reverse (21022342122), we get a palindrome (43146664134).

The spelling of 22124322012 in words is "twenty-two billion, one hundred twenty-four million, three hundred twenty-two thousand, twelve".