21125330200 has 48 divisors (see below), whose sum is σ = 52894583280. Its totient is φ = 7800120960.

The previous prime is 21125330189. The next prime is 21125330203. The reversal of 21125330200 is 203352112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21125330203) 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, 4059964 + ... + 4065163.

It is an arithmetic number, because the mean of its divisors is an integer number (1101970485).

Almost surely, 2^21125330200 is an apocalyptic number.

21125330200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21125330200 is an abundant number, since it is smaller than the sum of its proper divisors (31769253080).

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

21125330200 is a wasteful number, since it uses less digits than its factorization.

21125330200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125156 (or 8125147 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 21125330200 its reverse (203352112), we get a palindrome (21328682312).

The spelling of 21125330200 in words is "twenty-one billion, one hundred twenty-five million, three hundred thirty thousand, two hundred".