13220330321 has 32 divisors (see below), whose sum is σ = 15784312320. Its totient is φ = 10941955200.

The previous prime is 13220330309. The next prime is 13220330327. The reversal of 13220330321 is 12303302231.

It is not a de Polignac number, because 13220330321 - 2¹⁸ = 13220068177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13220330293 and 13220330302.

It is not an unprimeable number, because it can be changed into a prime (13220330327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 562610 + ... + 585636.

It is an arithmetic number, because the mean of its divisors is an integer number (493259760).

Almost surely, 2^13220330321 is an apocalyptic number.

13220330321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13220330321 is a deficient number, since it is larger than the sum of its proper divisors (2563981999).

13220330321 is a wasteful number, since it uses less digits than its factorization.

13220330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23165.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 13220330321 its reverse (12303302231), we get a palindrome (25523632552).

The spelling of 13220330321 in words is "thirteen billion, two hundred twenty million, three hundred thirty thousand, three hundred twenty-one".