21241200044020 has 96 divisors (see below), whose sum is σ = 50297408566272. Its totient is φ = 7465084800000.

The previous prime is 21241200043979. The next prime is 21241200044087. The reversal of 21241200044020 is 2044000214212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21241200043982 and 21241200044000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3143670 + ... + 7236370.

It is an arithmetic number, because the mean of its divisors is an integer number (523931339232).

Almost surely, 2^{21241200044020} is an apocalyptic number.

21241200044020 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 21241200044020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25148704283136).

21241200044020 is an abundant number, since it is smaller than the sum of its proper divisors (29056208522252).

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

21241200044020 is a wasteful number, since it uses less digits than its factorization.

21241200044020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093513 (or 4093511 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21241200044020 its reverse (2044000214212), we get a palindrome (23285200258232).

The spelling of 21241200044020 in words is "twenty-one trillion, two hundred forty-one billion, two hundred million, forty-four thousand, twenty".