21330512313200 has 120 divisors (see below), whose sum is σ = 53967560847600. Its totient is φ = 8079572551680.

The previous prime is 21330512313169. The next prime is 21330512313211. The reversal of 21330512313200 is 231321503312.

It is a self number, because there is not a number n which added to its sum of digits gives 21330512313200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16625924 + ... + 17862876.

It is an arithmetic number, because the mean of its divisors is an integer number (449729673730).

Almost surely, 2^{21330512313200} is an apocalyptic number.

21330512313200 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 21330512313200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26983780423800).

21330512313200 is an abundant number, since it is smaller than the sum of its proper divisors (32637048534400).

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

21330512313200 is a wasteful number, since it uses less digits than its factorization.

21330512313200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239259 (or 1239248 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 21330512313200 its reverse (231321503312), we get a palindrome (21561833816512).

The spelling of 21330512313200 in words is "twenty-one trillion, three hundred thirty billion, five hundred twelve million, three hundred thirteen thousand, two hundred".