12542105203 has 4 divisors (see below), whose sum is σ = 12542338528. Its totient is φ = 12541871880.

The previous prime is 12542105171. The next prime is 12542105237. The reversal of 12542105203 is 30250124521.

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 12542105203 - 2⁵ = 12542105171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12542105243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9313 + ... + 158653.

It is an arithmetic number, because the mean of its divisors is an integer number (3135584632).

Almost surely, 2^12542105203 is an apocalyptic number.

12542105203 is a deficient number, since it is larger than the sum of its proper divisors (233325).

12542105203 is an equidigital number, since it uses as much as digits as its factorization.

12542105203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233324.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 12542105203 its reverse (30250124521), we get a palindrome (42792229724).

The spelling of 12542105203 in words is "twelve billion, five hundred forty-two million, one hundred five thousand, two hundred three".