13003021021 has 4 divisors (see below), whose sum is σ = 13422473344. Its totient is φ = 12583568700.

The previous prime is 13003020977. The next prime is 13003021049. The reversal of 13003021021 is 12012030031.

13003021021 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12012030031 = 39209 ⋅306359.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13003021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13003020992 and 13003021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13003021921) 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, 209726115 + ... + 209726176.

It is an arithmetic number, because the mean of its divisors is an integer number (3355618336).

Almost surely, 2^13003021021 is an apocalyptic number.

It is an amenable number.

13003021021 is a deficient number, since it is larger than the sum of its proper divisors (419452323).

13003021021 is an equidigital number, since it uses as much as digits as its factorization.

13003021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419452322.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 13003021021 its reverse (12012030031), we get a palindrome (25015051052).

The spelling of 13003021021 in words is "thirteen billion, three million, twenty-one thousand, twenty-one".