12123131104 has 96 divisors (see below), whose sum is σ = 28205150400. Its totient is φ = 5020766208.

The previous prime is 12123131017. The next prime is 12123131117. The reversal of 12123131104 is 40113132121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230004 + ... + 1239820.

It is an arithmetic number, because the mean of its divisors is an integer number (293803650).

Almost surely, 2^12123131104 is an apocalyptic number.

12123131104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12123131104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14102575200).

12123131104 is an abundant number, since it is smaller than the sum of its proper divisors (16082019296).

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

12123131104 is a wasteful number, since it uses less digits than its factorization.

12123131104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10020 (or 10012 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12123131104 its reverse (40113132121), we get a palindrome (52236263225).

The spelling of 12123131104 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-one thousand, one hundred four".