12031321012 has 6 divisors (see below), whose sum is σ = 21054811778. Its totient is φ = 6015660504.

The previous prime is 12031320967. The next prime is 12031321013. The reversal of 12031321012 is 21012313021.

It can be written as a sum of positive squares in only one way, i.e., 9499621156 + 2531699856 = 97466^2 + 50316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031321013) by changing a digit.

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 as a sum of consecutive naturals, namely, 1503915123 + ... + 1503915130.

Almost surely, 2^12031321012 is an apocalyptic number.

It is an amenable number.

12031321012 is a deficient number, since it is larger than the sum of its proper divisors (9023490766).

12031321012 is a wasteful number, since it uses less digits than its factorization.

12031321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007830257 (or 3007830255 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12031321012 its reverse (21012313021), we get a palindrome (33043634033).

The spelling of 12031321012 in words is "twelve billion, thirty-one million, three hundred twenty-one thousand, twelve".