12123313012 has 6 divisors (see below), whose sum is σ = 21215797778. Its totient is φ = 6061656504.

The previous prime is 12123312997. The next prime is 12123313031. The reversal of 12123313012 is 21031332121.

12123313012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11610924516 + 512388496 = 107754^2 + 22636^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515414123 + ... + 1515414130.

Almost surely, 2^12123313012 is an apocalyptic number.

It is an amenable number.

12123313012 is a deficient number, since it is larger than the sum of its proper divisors (9092484766).

12123313012 is a wasteful number, since it uses less digits than its factorization.

12123313012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030828257 (or 3030828255 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12123313012 its reverse (21031332121), we get a palindrome (33154645133).

The spelling of 12123313012 in words is "twelve billion, one hundred twenty-three million, three hundred thirteen thousand, twelve".