21332413221600 has 288 divisors, whose sum is σ = 74784041265024. Its totient is φ = 5250653337600.

The previous prime is 21332413221599. The next prime is 21332413221619. The reversal of 21332413221600 is 612231423312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 772591795 + ... + 772619405.

It is an arithmetic number, because the mean of its divisors is an integer number (259666809948).

Almost surely, 2^{21332413221600} is an apocalyptic number.

21332413221600 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 21332413221600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37392020632512).

21332413221600 is an abundant number, since it is smaller than the sum of its proper divisors (53451628043424).

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

21332413221600 is a wasteful number, since it uses less digits than its factorization.

21332413221600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52410 (or 52397 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 21332413221600 its reverse (612231423312), we get a palindrome (21944644644912).

The spelling of 21332413221600 in words is "twenty-one trillion, three hundred thirty-two billion, four hundred thirteen million, two hundred twenty-one thousand, six hundred".