12505340201 has 12 divisors (see below), whose sum is σ = 13055062356. Its totient is φ = 11977090560.

The previous prime is 12505340191. The next prime is 12505340203. The reversal of 12505340201 is 10204350521.

It can be written as a sum of positive squares in 2 ways, for example, as 5083690000 + 7421650201 = 71300^2 + 86149^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12505340201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12505340203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26141 + ... + 160293.

It is an arithmetic number, because the mean of its divisors is an integer number (1087921863).

Almost surely, 2^12505340201 is an apocalyptic number.

It is an amenable number.

12505340201 is a deficient number, since it is larger than the sum of its proper divisors (549722155).

12505340201 is an equidigital number, since it uses as much as digits as its factorization.

12505340201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134312 (or 134281 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 12505340201 its reverse (10204350521), we get a palindrome (22709690722).

The spelling of 12505340201 in words is "twelve billion, five hundred five million, three hundred forty thousand, two hundred one".