12120031321312 has 96 divisors (see below), whose sum is σ = 25536533299200. Its totient is φ = 5651821056000.

The previous prime is 12120031321301. The next prime is 12120031321313. The reversal of 12120031321312 is 21312313002121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120031321313) 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, 2265889 + ... + 5419807.

It is an arithmetic number, because the mean of its divisors is an integer number (266005555200).

Almost surely, 2^{12120031321312} 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 12120031321312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12768266649600).

12120031321312 is an abundant number, since it is smaller than the sum of its proper divisors (13416501977888).

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

12120031321312 is a wasteful number, since it uses less digits than its factorization.

12120031321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154100 (or 3154092 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 12120031321312 its reverse (21312313002121), we get a palindrome (33432344323433).

The spelling of 12120031321312 in words is "twelve trillion, one hundred twenty billion, thirty-one million, three hundred twenty-one thousand, three hundred twelve".