21011332524424 has 16 divisors (see below), whose sum is σ = 42977725618320. Its totient is φ = 9550605692880.

The previous prime is 21011332524419. The next prime is 21011332524443. The reversal of 21011332524424 is 42442523311012.

It is a self number, because there is not a number n which added to its sum of digits gives 21011332524424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119382571074 + ... + 119382571249.

It is an arithmetic number, because the mean of its divisors is an integer number (2686107851145).

Almost surely, 2^{21011332524424} is an apocalyptic number.

It is an amenable number.

21011332524424 is an abundant number, since it is smaller than the sum of its proper divisors (21966393093896).

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

21011332524424 is a wasteful number, since it uses less digits than its factorization.

21011332524424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238765142340 (or 238765142336 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 21011332524424 its reverse (42442523311012), we get a palindrome (63453855835436).

The spelling of 21011332524424 in words is "twenty-one trillion, eleven billion, three hundred thirty-two million, five hundred twenty-four thousand, four hundred twenty-four".