21022132230 has 96 divisors (see below), whose sum is σ = 61618687200. Its totient is φ = 5096266560.

The previous prime is 21022132193. The next prime is 21022132231. The reversal of 21022132230 is 3223122012.

21022132230 is a `hidden beast` number, since 210 + 221 + 3 + 2 + 230 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022132231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289065 + ... + 354404.

It is an arithmetic number, because the mean of its divisors is an integer number (641861325).

Almost surely, 2^21022132230 is an apocalyptic number.

21022132230 is an abundant number, since it is smaller than the sum of its proper divisors (40596554970).

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

21022132230 is a wasteful number, since it uses less digits than its factorization.

21022132230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643507 (or 643490 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21022132230 its reverse (3223122012), we get a palindrome (24245254242).

The spelling of 21022132230 in words is "twenty-one billion, twenty-two million, one hundred thirty-two thousand, two hundred thirty".