22121444424 has 32 divisors (see below), whose sum is σ = 56240964000. Its totient is φ = 7248834432.

The previous prime is 22121444417. The next prime is 22121444437. The reversal of 22121444424 is 42444412122.

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

It is a junction number, because it is equal to n+sod(n) for n = 22121444391 and 22121444400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7809829 + ... + 7812660.

It is an arithmetic number, because the mean of its divisors is an integer number (1757530125).

Almost surely, 2^22121444424 is an apocalyptic number.

22121444424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22121444424 is an abundant number, since it is smaller than the sum of its proper divisors (34119519576).

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

22121444424 is a wasteful number, since it uses less digits than its factorization.

22121444424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15622557 (or 15622553 counting only the distinct ones).

The product of its digits is 16384, while the sum is 30.

Adding to 22121444424 its reverse (42444412122), we get a palindrome (64565856546).

The spelling of 22121444424 in words is "twenty-two billion, one hundred twenty-one million, four hundred forty-four thousand, four hundred twenty-four".