21013312003200 has 576 divisors, whose sum is σ = 81817250860800. Its totient is φ = 5092856832000.

The previous prime is 21013312003147. The next prime is 21013312003213. The reversal of 21013312003200 is 230021331012.

21013312003200 is a `hidden beast` number, since 2 + 10 + 1 + 331 + 2 + 0 + 0 + 320 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 2084855761 + ... + 2084865839.

It is an arithmetic number, because the mean of its divisors is an integer number (142043838300).

Almost surely, 2^{21013312003200} is an apocalyptic number.

21013312003200 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 21013312003200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40908625430400).

21013312003200 is an abundant number, since it is smaller than the sum of its proper divisors (60803938857600).

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

21013312003200 is a wasteful number, since it uses less digits than its factorization.

21013312003200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16701 (or 16681 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21013312003200 its reverse (230021331012), we get a palindrome (21243333334212).

The spelling of 21013312003200 in words is "twenty-one trillion, thirteen billion, three hundred twelve million, three thousand, two hundred".