12243320503 has 4 divisors (see below), whose sum is σ = 12369540400. Its totient is φ = 12117100608.

The previous prime is 12243320489. The next prime is 12243320527. The reversal of 12243320503 is 30502334221.

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 12243320503 - 2²⁵ = 12209766071 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 (12243323503) 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, 63109803 + ... + 63109996.

It is an arithmetic number, because the mean of its divisors is an integer number (3092385100).

Almost surely, 2^12243320503 is an apocalyptic number.

12243320503 is a deficient number, since it is larger than the sum of its proper divisors (126219897).

12243320503 is an equidigital number, since it uses as much as digits as its factorization.

12243320503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126219896.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 12243320503 its reverse (30502334221), we get a palindrome (42745654724).

The spelling of 12243320503 in words is "twelve billion, two hundred forty-three million, three hundred twenty thousand, five hundred three".