21132130200 has 96 divisors (see below), whose sum is σ = 65670536400. Its totient is φ = 5621391360.

The previous prime is 21132130199. The next prime is 21132130223. The reversal of 21132130200 is 203123112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21132130200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202344 + ... + 288456.

Almost surely, 2^21132130200 is an apocalyptic number.

21132130200 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 21132130200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32835268200).

21132130200 is an abundant number, since it is smaller than the sum of its proper divisors (44538406200).

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

21132130200 is a wasteful number, since it uses less digits than its factorization.

21132130200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86541 (or 86532 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21132130200 its reverse (203123112), we get a palindrome (21335253312).

The spelling of 21132130200 in words is "twenty-one billion, one hundred thirty-two million, one hundred thirty thousand, two hundred".