12001238547 has 24 divisors (see below), whose sum is σ = 16399362000. Its totient is φ = 7806653376.

The previous prime is 12001238441. The next prime is 12001238581. The reversal of 12001238547 is 74583210021.

12001238547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12001238547 - 2²⁷ = 11867020819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12001238597) 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 23 ways as a sum of consecutive naturals, for example, 2310229 + ... + 2315417.

It is an arithmetic number, because the mean of its divisors is an integer number (683306750).

Almost surely, 2^12001238547 is an apocalyptic number.

12001238547 is a deficient number, since it is larger than the sum of its proper divisors (4398123453).

12001238547 is an equidigital number, since it uses as much as digits as its factorization.

12001238547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635 (or 5588 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

Adding to 12001238547 its reverse (74583210021), we get a palindrome (86584448568).

The spelling of 12001238547 in words is "twelve billion, one million, two hundred thirty-eight thousand, five hundred forty-seven".