21242024421300 has 216 divisors, whose sum is σ = 67340768040000. Its totient is φ = 5600002383360.

The previous prime is 21242024421281. The next prime is 21242024421311. The reversal of 21242024421300 is 312442024212.

It is a happy number.

21242024421300 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 202 + 4 + 421 + 30 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 615711451 + ... + 615745949.

It is an arithmetic number, because the mean of its divisors is an integer number (311762815000).

Almost surely, 2^{21242024421300} is an apocalyptic number.

21242024421300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21242024421300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33670384020000).

21242024421300 is an abundant number, since it is smaller than the sum of its proper divisors (46098743618700).

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

21242024421300 is a wasteful number, since it uses less digits than its factorization.

21242024421300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42295 (or 42285 counting only the distinct ones).

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

Adding to 21242024421300 its reverse (312442024212), we get a palindrome (21554466445512).

The spelling of 21242024421300 in words is "twenty-one trillion, two hundred forty-two billion, twenty-four million, four hundred twenty-one thousand, three hundred".