12124432015 has 4 divisors (see below), whose sum is σ = 14549318424. Its totient is φ = 9699545608.

The previous prime is 12124432013. The next prime is 12124432069. The reversal of 12124432015 is 51023442121.

12124432015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51023442121 = 23 ⋅2218410527.

It is a cyclic number.

It is not a de Polignac number, because 12124432015 - 2¹ = 12124432013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12124432013) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1212443197 + ... + 1212443206.

It is an arithmetic number, because the mean of its divisors is an integer number (3637329606).

Almost surely, 2^12124432015 is an apocalyptic number.

12124432015 is a deficient number, since it is larger than the sum of its proper divisors (2424886409).

12124432015 is an equidigital number, since it uses as much as digits as its factorization.

12124432015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424886408.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 12124432015 its reverse (51023442121), we get a palindrome (63147874136).

The spelling of 12124432015 in words is "twelve billion, one hundred twenty-four million, four hundred thirty-two thousand, fifteen".