22112040312 has 80 divisors (see below), whose sum is σ = 62205059400. Its totient is φ = 7338444480.

The previous prime is 22112040289. The next prime is 22112040317. The reversal of 22112040312 is 21304021122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112040317) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 73887 + ... + 222897.

Almost surely, 2^22112040312 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 22112040312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31102529700).

22112040312 is an abundant number, since it is smaller than the sum of its proper divisors (40093019088).

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

22112040312 is a wasteful number, since it uses less digits than its factorization.

22112040312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149258 (or 149245 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22112040312 its reverse (21304021122), we get a palindrome (43416061434).

The spelling of 22112040312 in words is "twenty-two billion, one hundred twelve million, forty thousand, three hundred twelve".