12123031503 has 32 divisors (see below), whose sum is σ = 17799897600. Its totient is φ = 7338756480.

The previous prime is 12123031489. The next prime is 12123031511. The reversal of 12123031503 is 30513032121.

It is not a de Polignac number, because 12123031503 - 2⁵ = 12123031471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12123031503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123031573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5944558 + ... + 5946596.

It is an arithmetic number, because the mean of its divisors is an integer number (556246800).

Almost surely, 2^12123031503 is an apocalyptic number.

12123031503 is a deficient number, since it is larger than the sum of its proper divisors (5676866097).

12123031503 is a wasteful number, since it uses less digits than its factorization.

12123031503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564 (or 3542 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 12123031503 its reverse (30513032121), we get a palindrome (42636063624).

The spelling of 12123031503 in words is "twelve billion, one hundred twenty-three million, thirty-one thousand, five hundred three".