13000133021 has 4 divisors (see below), whose sum is σ = 13448413500. Its totient is φ = 12551852544.

The previous prime is 13000133011. The next prime is 13000133023. The reversal of 13000133021 is 12033100031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12033100031 = 27077 ⋅444403.

It can be written as a sum of positive squares in 2 ways, for example, as 4181044921 + 8819088100 = 64661^2 + 93910^2 .

It is a cyclic number.

It is not a de Polignac number, because 13000133021 - 2²² = 12995938717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13000132987 and 13000133005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13000133023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224140196 + ... + 224140253.

It is an arithmetic number, because the mean of its divisors is an integer number (3362103375).

Almost surely, 2^13000133021 is an apocalyptic number.

It is an amenable number.

13000133021 is a deficient number, since it is larger than the sum of its proper divisors (448280479).

13000133021 is an equidigital number, since it uses as much as digits as its factorization.

13000133021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448280478.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 13000133021 its reverse (12033100031), we get a palindrome (25033233052).

The spelling of 13000133021 in words is "thirteen billion, one hundred thirty-three thousand, twenty-one".