12423121506 has 12 divisors (see below), whose sum is σ = 26916763302. Its totient is φ = 4141040496.

The previous prime is 12423121493. The next prime is 12423121547. The reversal of 12423121506 is 60512132421.

12423121506 is a `hidden beast` number, since 12 + 4 + 23 + 121 + 506 = 666.

12423121506 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., 12357657225 + 65464281 = 111165^2 + 8091^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12423121506.

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 5 ways as a sum of consecutive naturals, for example, 345086691 + ... + 345086726.

Almost surely, 2^12423121506 is an apocalyptic number.

12423121506 is an abundant number, since it is smaller than the sum of its proper divisors (14493641796).

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

12423121506 is a wasteful number, since it uses less digits than its factorization.

12423121506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690173425 (or 690173422 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 12423121506 its reverse (60512132421), we get a palindrome (72935253927).

The spelling of 12423121506 in words is "twelve billion, four hundred twenty-three million, one hundred twenty-one thousand, five hundred six".