12501112105 has 4 divisors (see below), whose sum is σ = 15001334532. Its totient is φ = 10000889680.

The previous prime is 12501112051. The next prime is 12501112109. The reversal of 12501112105 is 50121110521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9582843664 + 2918268441 = 97892^2 + 54021^2 .

It is not a de Polignac number, because 12501112105 - 2¹³ = 12501103913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12501112109) 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, 1250111206 + ... + 1250111215.

It is an arithmetic number, because the mean of its divisors is an integer number (3750333633).

Almost surely, 2^12501112105 is an apocalyptic number.

It is an amenable number.

12501112105 is a deficient number, since it is larger than the sum of its proper divisors (2500222427).

12501112105 is an equidigital number, since it uses as much as digits as its factorization.

12501112105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500222426.

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 12501112105 its reverse (50121110521), we get a palindrome (62622222626).

The spelling of 12501112105 in words is "twelve billion, five hundred one million, one hundred twelve thousand, one hundred five".