21222300232 has 24 divisors (see below), whose sum is σ = 46288436310. Its totient is φ = 9095271360.

The previous prime is 21222300181. The next prime is 21222300233. The reversal of 21222300232 is 23200322212.

It can be written as a sum of positive squares in only one way, i.e., 19517766436 + 1704533796 = 139706^2 + 41286^2 .

It is not an unprimeable number, because it can be changed into a prime (21222300233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27068869 + ... + 27069652.

Almost surely, 2^21222300232 is an apocalyptic number.

It is an amenable number.

21222300232 is an abundant number, since it is smaller than the sum of its proper divisors (25066136078).

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

21222300232 is a wasteful number, since it uses less digits than its factorization.

21222300232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54138541 (or 54138530 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21222300232 its reverse (23200322212), we get a palindrome (44422622444).

The spelling of 21222300232 in words is "twenty-one billion, two hundred twenty-two million, three hundred thousand, two hundred thirty-two".