13220011321 has 16 divisors (see below), whose sum is σ = 14568838848. Its totient is φ = 11896192000.

The previous prime is 13220011313. The next prime is 13220011333. The reversal of 13220011321 is 12311002231.

It is not a de Polignac number, because 13220011321 - 2³ = 13220011313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13220011295 and 13220011304.

It is not an unprimeable number, because it can be changed into a prime (13220011391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519546 + ... + 544396.

It is an arithmetic number, because the mean of its divisors is an integer number (910552428).

Almost surely, 2^13220011321 is an apocalyptic number.

13220011321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13220011321 is a deficient number, since it is larger than the sum of its proper divisors (1348827527).

13220011321 is a wasteful number, since it uses less digits than its factorization.

13220011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25352.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13220011321 its reverse (12311002231), we get a palindrome (25531013552).

The spelling of 13220011321 in words is "thirteen billion, two hundred twenty million, eleven thousand, three hundred twenty-one".