12123020121212 has 48 divisors (see below), whose sum is σ = 28484858476032. Its totient is φ = 4359927314880.

The previous prime is 12123020121193. The next prime is 12123020121217. The reversal of 12123020121212 is 21212102032121.

12123020121212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12123020121212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123020121217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1513859648 + ... + 1513867655.

It is an arithmetic number, because the mean of its divisors is an integer number (593434551584).

Almost surely, 2^{12123020121212} is an apocalyptic number.

It is an amenable number.

12123020121212 is an abundant number, since it is smaller than the sum of its proper divisors (16361838354820).

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

12123020121212 is a wasteful number, since it uses less digits than its factorization.

12123020121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027727338 (or 3027727336 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12123020121212 its reverse (21212102032121), we get a palindrome (33335122153333).

The spelling of 12123020121212 in words is "twelve trillion, one hundred twenty-three billion, twenty million, one hundred twenty-one thousand, two hundred twelve".