12513225121 has 2 divisors, whose sum is σ = 12513225122. Its totient is φ = 12513225120.

The previous prime is 12513225107. The next prime is 12513225149. The reversal of 12513225121 is 12152231521.

It is a happy number.

12513225121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12495886225 + 17338896 = 111785^2 + 4164^2 .

It is an emirp because it is prime and its reverse (12152231521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12513225121 - 2²¹ = 12511127969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12513225821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256612560 + 6256612561.

It is an arithmetic number, because the mean of its divisors is an integer number (6256612561).

Almost surely, 2^12513225121 is an apocalyptic number.

It is an amenable number.

12513225121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513225121 is an equidigital number, since it uses as much as digits as its factorization.

12513225121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

Adding to 12513225121 its reverse (12152231521), we get a palindrome (24665456642).

The spelling of 12513225121 in words is "twelve billion, five hundred thirteen million, two hundred twenty-five thousand, one hundred twenty-one".