12517020243 has 24 divisors (see below), whose sum is σ = 22252481888. Its totient is φ = 6602383872.

The previous prime is 12517020221. The next prime is 12517020277. The reversal of 12517020243 is 34202071521.

It is not a de Polignac number, because 12517020243 - 2¹⁰ = 12517019219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12517020143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7640830 + ... + 7642467.

Almost surely, 2^12517020243 is an apocalyptic number.

12517020243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12517020243 is a deficient number, since it is larger than the sum of its proper divisors (9735461645).

12517020243 is a wasteful number, since it uses less digits than its factorization.

12517020243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15283323 (or 15283320 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

Adding to 12517020243 its reverse (34202071521), we get a palindrome (46719091764).

The spelling of 12517020243 in words is "twelve billion, five hundred seventeen million, twenty thousand, two hundred forty-three".