13303424021 has 4 divisors (see below), whose sum is σ = 13336600044. Its totient is φ = 13270248000.

The previous prime is 13303423961. The next prime is 13303424063. The reversal of 13303424021 is 12042430331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12042430331 = 269 ⋅44767399.

It can be written as a sum of positive squares in 2 ways, for example, as 9602040100 + 3701383921 = 97990^2 + 60839^2 .

It is a cyclic number.

It is not a de Polignac number, because 13303424021 - 2⁶ = 13303423957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13303424221) 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, 16587410 + ... + 16588211.

It is an arithmetic number, because the mean of its divisors is an integer number (3334150011).

Almost surely, 2^13303424021 is an apocalyptic number.

It is an amenable number.

13303424021 is a deficient number, since it is larger than the sum of its proper divisors (33176023).

13303424021 is an equidigital number, since it uses as much as digits as its factorization.

13303424021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33176022.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 13303424021 its reverse (12042430331), we get a palindrome (25345854352).

The spelling of 13303424021 in words is "thirteen billion, three hundred three million, four hundred twenty-four thousand, twenty-one".