12423121505 has 16 divisors (see below), whose sum is σ = 15428275200. Its totient is φ = 9593129280.

The previous prime is 12423121493. The next prime is 12423121547. The reversal of 12423121505 is 50512132421.

12423121505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12423121505 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 42725 + ... + 163314.

It is an arithmetic number, because the mean of its divisors is an integer number (964267200).

Almost surely, 2^12423121505 is an apocalyptic number.

It is an amenable number.

12423121505 is a deficient number, since it is larger than the sum of its proper divisors (3005153695).

12423121505 is a wasteful number, since it uses less digits than its factorization.

12423121505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206464.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 12423121505 its reverse (50512132421), we get a palindrome (62935253926).

The spelling of 12423121505 in words is "twelve billion, four hundred twenty-three million, one hundred twenty-one thousand, five hundred five".