23121103012 has 96 divisors (see below), whose sum is σ = 48316665600. Its totient is φ = 9475315200.

The previous prime is 23121103007. The next prime is 23121103013. The reversal of 23121103012 is 21030112132.

It is not an unprimeable number, because it can be changed into a prime (23121103013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15590023 + ... + 15591505.

It is an arithmetic number, because the mean of its divisors is an integer number (503298600).

Almost surely, 2^23121103012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23121103012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24158332800).

23121103012 is an abundant number, since it is smaller than the sum of its proper divisors (25195562588).

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

23121103012 is a wasteful number, since it uses less digits than its factorization.

23121103012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 23121103012 its reverse (21030112132), we get a palindrome (44151215144).

The spelling of 23121103012 in words is "twenty-three billion, one hundred twenty-one million, one hundred three thousand, twelve".