12031320013212 has 96 divisors (see below), whose sum is σ = 28937206029312. Its totient is φ = 3888613206016.

The previous prime is 12031320013199. The next prime is 12031320013217. The reversal of 12031320013212 is 21231002313021.

It is a super-2 number, since 2×12031320013212² (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 (12031320013217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144438808 + ... + 144522080.

It is an arithmetic number, because the mean of its divisors is an integer number (301429229472).

Almost surely, 2^{12031320013212} is an apocalyptic number.

12031320013212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12031320013212 is an abundant number, since it is smaller than the sum of its proper divisors (16905886016100).

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

12031320013212 is a wasteful number, since it uses less digits than its factorization.

12031320013212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85707 (or 85705 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 12031320013212 its reverse (21231002313021), we get a palindrome (33262322326233).

The spelling of 12031320013212 in words is "twelve trillion, thirty-one billion, three hundred twenty million, thirteen thousand, two hundred twelve".