13330021321 has 4 divisors (see below), whose sum is σ = 13330818000. Its totient is φ = 13329224644.

The previous prime is 13330021319. The next prime is 13330021363. The reversal of 13330021321 is 12312003331.

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.

It is a cyclic number.

It is not a de Polignac number, because 13330021321 - 2¹ = 13330021319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13330021301) 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, 372691 + ... + 406888.

It is an arithmetic number, because the mean of its divisors is an integer number (3332704500).

Almost surely, 2^13330021321 is an apocalyptic number.

It is an amenable number.

13330021321 is a deficient number, since it is larger than the sum of its proper divisors (796679).

13330021321 is an equidigital number, since it uses as much as digits as its factorization.

13330021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796678.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 13330021321 its reverse (12312003331), we get a palindrome (25642024652).

The spelling of 13330021321 in words is "thirteen billion, three hundred thirty million, twenty-one thousand, three hundred twenty-one".