21113233230 has 16 divisors (see below), whose sum is σ = 50671759824. Its totient is φ = 5630195520.

The previous prime is 21113233201. The next prime is 21113233231. The reversal of 21113233230 is 3233231112.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21113233197 and 21113233206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113233231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351887191 + ... + 351887250.

It is an arithmetic number, because the mean of its divisors is an integer number (3166984989).

Almost surely, 2^21113233230 is an apocalyptic number.

21113233230 is an abundant number, since it is smaller than the sum of its proper divisors (29558526594).

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

21113233230 is a wasteful number, since it uses less digits than its factorization.

21113233230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703774451.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21113233230 its reverse (3233231112), we get a palindrome (24346464342).

The spelling of 21113233230 in words is "twenty-one billion, one hundred thirteen million, two hundred thirty-three thousand, two hundred thirty".