12500007500001 has 64 divisors (see below), whose sum is σ = 20478402846720. Its totient is φ = 6622405205760.

The previous prime is 12500007499999. The next prime is 12500007500047. The reversal of 12500007500001 is 10000570000521.

12500007500001 is a nontrivial binomial coefficient, being equal to C(5000002, 2).

It is not a de Polignac number, because 12500007500001 - 2¹ = 12500007499999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12500007500401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 352482411 + ... + 352517871.

It is an arithmetic number, because the mean of its divisors is an integer number (319975044480).

Almost surely, 2^{12500007500001} is an apocalyptic number.

12500007500001 is the 5000001-st triangular number and also the 2500001-st hexagonal number.

It is an amenable number.

12500007500001 is a deficient number, since it is larger than the sum of its proper divisors (7978395346719).

12500007500001 is a wasteful number, since it uses less digits than its factorization.

12500007500001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54334.

The product of its (nonzero) digits is 350, while the sum is 21.

Adding to 12500007500001 its reverse (10000570000521), we get a palindrome (22500577500522).

The spelling of 12500007500001 in words is "twelve trillion, five hundred billion, seven million, five hundred thousand, one".