12444520142203 has 4 divisors (see below), whose sum is σ = 12444527826808. Its totient is φ = 12444512457600.

The previous prime is 12444520142167. The next prime is 12444520142207. The reversal of 12444520142203 is 30224102544421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12444520142203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12444520142207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362973 + ... + 5002078.

It is an arithmetic number, because the mean of its divisors is an integer number (3111131956702).

Almost surely, 2^{12444520142203} is an apocalyptic number.

12444520142203 is a deficient number, since it is larger than the sum of its proper divisors (7684605).

12444520142203 is an equidigital number, since it uses as much as digits as its factorization.

12444520142203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7684604.

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 12444520142203 its reverse (30224102544421), we get a palindrome (42668622686624).

The spelling of 12444520142203 in words is "twelve trillion, four hundred forty-four billion, five hundred twenty million, one hundred forty-two thousand, two hundred three".