21013230003200 has 132 divisors (see below), whose sum is σ = 52092050554980. Its totient is φ = 8404535869440.

The previous prime is 21013230003187. The next prime is 21013230003209. The reversal of 21013230003200 is 230003231012.

It can be written as a sum of positive squares in 6 ways, for example, as 3490500050944 + 17522729952256 = 1868288^2 + 4186016^2 .

It is not an unprimeable number, because it can be changed into a prime (21013230003209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348974696 + ... + 349034904.

Almost surely, 2^{21013230003200} is an apocalyptic number.

21013230003200 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 21013230003200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26046025277490).

21013230003200 is an abundant number, since it is smaller than the sum of its proper divisors (31078820551780).

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

21013230003200 is a wasteful number, since it uses less digits than its factorization.

21013230003200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73872 (or 73849 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21013230003200 its reverse (230003231012), we get a palindrome (21243233234212).

The spelling of 21013230003200 in words is "twenty-one trillion, thirteen billion, two hundred thirty million, three thousand, two hundred".