12365218543103 has 4 divisors (see below), whose sum is σ = 12439261768080. Its totient is φ = 12291175318128.

The previous prime is 12365218543099. The next prime is 12365218543109. The reversal of 12365218543103 is 30134581256321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12365218543103 - 2² = 12365218543099 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 (12365218543109) 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, 37021612238 + ... + 37021612571.

It is an arithmetic number, because the mean of its divisors is an integer number (3109815442020).

Almost surely, 2^{12365218543103} is an apocalyptic number.

12365218543103 is a deficient number, since it is larger than the sum of its proper divisors (74043224977).

12365218543103 is an equidigital number, since it uses as much as digits as its factorization.

12365218543103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74043224976.

The product of its (nonzero) digits is 518400, while the sum is 44.

Adding to 12365218543103 its reverse (30134581256321), we get a palindrome (42499799799424).

The spelling of 12365218543103 in words is "twelve trillion, three hundred sixty-five billion, two hundred eighteen million, five hundred forty-three thousand, one hundred three".