22221443124 has 72 divisors (see below), whose sum is σ = 58573566688. Its totient is φ = 7366165920.

The previous prime is 22221443099. The next prime is 22221443129. The reversal of 22221443124 is 42134412222.

It is a happy number.

22221443124 is a `hidden beast` number, since 2 + 2 + 221 + 4 + 431 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221443129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112779 + ... + 239085.

Almost surely, 2^22221443124 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 22221443124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29286783344).

22221443124 is an abundant number, since it is smaller than the sum of its proper divisors (36352123564).

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

22221443124 is a wasteful number, since it uses less digits than its factorization.

22221443124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126507 (or 126493 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

Adding to 22221443124 its reverse (42134412222), we get a palindrome (64355855346).

The spelling of 22221443124 in words is "twenty-two billion, two hundred twenty-one million, four hundred forty-three thousand, one hundred twenty-four".