12123132212312 has 16 divisors (see below), whose sum is σ = 24797315889000. Its totient is φ = 5510514641920.

The previous prime is 12123132212281. The next prime is 12123132212353. The reversal of 12123132212312 is 21321223132121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68881432937 + ... + 68881433112.

Almost surely, 2^{12123132212312} is an apocalyptic number.

It is an amenable number.

12123132212312 is an abundant number, since it is smaller than the sum of its proper divisors (12674183676688).

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

12123132212312 is a wasteful number, since it uses less digits than its factorization.

12123132212312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137762866066 (or 137762866062 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

Adding to 12123132212312 its reverse (21321223132121), we get a palindrome (33444355344433).

The spelling of 12123132212312 in words is "twelve trillion, one hundred twenty-three billion, one hundred thirty-two million, two hundred twelve thousand, three hundred twelve".