21202442224424 has 32 divisors (see below), whose sum is σ = 39883915693440. Its totient is φ = 10566733953600.

The previous prime is 21202442224357. The next prime is 21202442224429. The reversal of 21202442224424 is 42442224420212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21202442224429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72162134 + ... + 72455354.

It is an arithmetic number, because the mean of its divisors is an integer number (1246372365420).

Almost surely, 2^{21202442224424} is an apocalyptic number.

It is an amenable number.

21202442224424 is a deficient number, since it is larger than the sum of its proper divisors (18681473469016).

21202442224424 is a wasteful number, since it uses less digits than its factorization.

21202442224424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322601 (or 322597 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 35.

Adding to 21202442224424 its reverse (42442224420212), we get a palindrome (63644666644636).

The spelling of 21202442224424 in words is "twenty-one trillion, two hundred two billion, four hundred forty-two million, two hundred twenty-four thousand, four hundred twenty-four".