21221113230 has 48 divisors (see below), whose sum is σ = 55197136800. Its totient is φ = 5656682304.

The previous prime is 21221113189. The next prime is 21221113241. The reversal of 21221113230 is 3231112212.

21221113230 is a `hidden beast` number, since 212 + 211 + 13 + 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183159 + ... + 275661.

It is an arithmetic number, because the mean of its divisors is an integer number (1149940350).

Almost surely, 2^21221113230 is an apocalyptic number.

21221113230 is an abundant number, since it is smaller than the sum of its proper divisors (33976023570).

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

21221113230 is a wasteful number, since it uses less digits than its factorization.

21221113230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95065 (or 95062 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21221113230 its reverse (3231112212), we get a palindrome (24452225442).

The spelling of 21221113230 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirteen thousand, two hundred thirty".