12012121121312 has 96 divisors (see below), whose sum is σ = 26085169756800. Its totient is φ = 5409953740800.

The previous prime is 12012121121293. The next prime is 12012121121339. The reversal of 12012121121312 is 21312112121021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18444437 + ... + 19084587.

It is an arithmetic number, because the mean of its divisors is an integer number (271720518300).

Almost surely, 2^{12012121121312} 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 12012121121312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13042584878400).

12012121121312 is an abundant number, since it is smaller than the sum of its proper divisors (14073048635488).

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

12012121121312 is a wasteful number, since it uses less digits than its factorization.

12012121121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641266 (or 641258 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 12012121121312 its reverse (21312112121021), we get a palindrome (33324233242333).

The spelling of 12012121121312 in words is "twelve trillion, twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, three hundred twelve".