23121112230 has 144 divisors (see below), whose sum is σ = 64423758672. Its totient is φ = 5966136000.

The previous prime is 23121112229. The next prime is 23121112271. The reversal of 23121112230 is 3221112132.

23121112230 is a `hidden beast` number, since 231 + 211 + 1 + 223 + 0 = 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2330280 + ... + 2340180.

It is an arithmetic number, because the mean of its divisors is an integer number (447387213).

Almost surely, 2^23121112230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23121112230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32211879336).

23121112230 is an abundant number, since it is smaller than the sum of its proper divisors (41302646442).

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

23121112230 is an equidigital number, since it uses as much as digits as its factorization.

23121112230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9985 (or 9942 counting only the distinct ones).

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

Adding to 23121112230 its reverse (3221112132), we get a palindrome (26342224362).

The spelling of 23121112230 in words is "twenty-three billion, one hundred twenty-one million, one hundred twelve thousand, two hundred thirty".