23121211230 has 96 divisors (see below), whose sum is σ = 65519659296. Its totient is φ = 5622780672.

The previous prime is 23121211181. The next prime is 23121211259. The reversal of 23121211230 is 3211212132.

23121211230 is a `hidden beast` number, since 2 + 312 + 121 + 1 + 230 = 666.

It is a super-2 number, since 2×23121211230² (a number of 22 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 21937 + ... + 216156.

It is an arithmetic number, because the mean of its divisors is an integer number (682496451).

Almost surely, 2^23121211230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23121211230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32759829648).

23121211230 is an abundant number, since it is smaller than the sum of its proper divisors (42398448066).

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

23121211230 is a wasteful number, since it uses less digits than its factorization.

23121211230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238202 (or 238199 counting only the distinct ones).

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

Adding to 23121211230 its reverse (3211212132), we get a palindrome (26332423362).

The spelling of 23121211230 in words is "twenty-three billion, one hundred twenty-one million, two hundred eleven thousand, two hundred thirty".