13113332521 has 4 divisors (see below), whose sum is σ = 13114588500. Its totient is φ = 13112076544.

The previous prime is 13113332513. The next prime is 13113332593. The reversal of 13113332521 is 12523331131.

13113332521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12523331131 = 5407 ⋅2316133.

It can be written as a sum of positive squares in 2 ways, for example, as 4171738921 + 8941593600 = 64589^2 + 94560^2 .

It is a cyclic number.

It is not a de Polignac number, because 13113332521 - 2³ = 13113332513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13113332821) 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 in 3 ways as a sum of consecutive naturals, for example, 612196 + ... + 633253.

It is an arithmetic number, because the mean of its divisors is an integer number (3278647125).

Almost surely, 2^13113332521 is an apocalyptic number.

It is an amenable number.

13113332521 is a deficient number, since it is larger than the sum of its proper divisors (1255979).

13113332521 is a wasteful number, since it uses less digits than its factorization.

13113332521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255978.

The product of its digits is 1620, while the sum is 25.

Adding to 13113332521 its reverse (12523331131), we get a palindrome (25636663652).

The spelling of 13113332521 in words is "thirteen billion, one hundred thirteen million, three hundred thirty-two thousand, five hundred twenty-one".