13125135321 has 16 divisors (see below), whose sum is σ = 19451973120. Its totient is φ = 8746792560.

The previous prime is 13125135313. The next prime is 13125135329. The reversal of 13125135321 is 12353152131.

13125135321 is a `hidden beast` number, since 1 + 3 + 125 + 1 + 3 + 532 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (13125135313) and next prime (13125135329).

It is not a de Polignac number, because 13125135321 - 2³ = 13125135313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13125135329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17545 + ... + 162966.

It is an arithmetic number, because the mean of its divisors is an integer number (1215748320).

Almost surely, 2^13125135321 is an apocalyptic number.

It is an amenable number.

13125135321 is a deficient number, since it is larger than the sum of its proper divisors (6326837799).

13125135321 is a wasteful number, since it uses less digits than its factorization.

13125135321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183213 (or 183207 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

Adding to 13125135321 its reverse (12353152131), we get a palindrome (25478287452).

The spelling of 13125135321 in words is "thirteen billion, one hundred twenty-five million, one hundred thirty-five thousand, three hundred twenty-one".