21441242523200 has 84 divisors (see below), whose sum is σ = 52760356605060. Its totient is φ = 8576253296640.

The previous prime is 21441242523187. The next prime is 21441242523203. The reversal of 21441242523200 is 232524214412.

It can be written as a sum of positive squares in 6 ways, for example, as 5898913997824 + 15542328525376 = 2428768^2 + 3942376^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (21441242523203) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 62602016 + ... + 62943584.

Almost surely, 2^{21441242523200} is an apocalyptic number.

21441242523200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21441242523200 is an abundant number, since it is smaller than the sum of its proper divisors (31319114081860).

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

21441242523200 is a wasteful number, since it uses less digits than its factorization.

21441242523200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380824 (or 380809 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 21441242523200 its reverse (232524214412), we get a palindrome (21673766737612).

The spelling of 21441242523200 in words is "twenty-one trillion, four hundred forty-one billion, two hundred forty-two million, five hundred twenty-three thousand, two hundred".