22256121412 has 12 divisors (see below), whose sum is σ = 44512242880. Its totient is φ = 9538337736.

The previous prime is 22256121397. The next prime is 22256121413. The reversal of 22256121412 is 21412165222.

It is a happy number.

22256121412 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 794861479 = 22256121412 / (2 + 2 + 2 + 5 + 6 + 1 + 2 + 1 + 4 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (22256121413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397430712 + ... + 397430767.

Almost surely, 2^22256121412 is an apocalyptic number.

It is an amenable number.

22256121412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22256121412 is a wasteful number, since it uses less digits than its factorization.

22256121412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794861490 (or 794861488 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

Adding to 22256121412 its reverse (21412165222), we get a palindrome (43668286634).

The spelling of 22256121412 in words is "twenty-two billion, two hundred fifty-six million, one hundred twenty-one thousand, four hundred twelve".