12312257042 has 18 divisors (see below), whose sum is σ = 19090900647. Its totient is φ = 5955189900.

The previous prime is 12312256969. The next prime is 12312257059. The reversal of 12312257042 is 24075221321.

12312257042 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., 6156128521 + 6156128521 = 78461^2 + 78461^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78461.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312256996 and 12312257014.

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 in 8 ways as a sum of consecutive naturals, for example, 4863317 + ... + 4865847.

Almost surely, 2^12312257042 is an apocalyptic number.

12312257042 is a deficient number, since it is larger than the sum of its proper divisors (6778643605).

12312257042 is an frugal number, since it uses more digits than its factorization.

12312257042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 12312257042 its reverse (24075221321), we get a palindrome (36387478363).

The spelling of 12312257042 in words is "twelve billion, three hundred twelve million, two hundred fifty-seven thousand, forty-two".