13111340321 has 4 divisors (see below), whose sum is σ = 13882595652. Its totient is φ = 12340084992.

The previous prime is 13111340311. The next prime is 13111340339. The reversal of 13111340321 is 12304311131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12304311131 = 7 ⋅1757758733.

It can be written as a sum of positive squares in 2 ways, for example, as 9912193600 + 3199146721 = 99560^2 + 56561^2 .

It is a cyclic number.

It is not a de Polignac number, because 13111340321 - 2¹⁸ = 13111078177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111340293 and 13111340302.

It is not an unprimeable number, because it can be changed into a prime (13111340311) 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, 385627640 + ... + 385627673.

It is an arithmetic number, because the mean of its divisors is an integer number (3470648913).

Almost surely, 2^13111340321 is an apocalyptic number.

It is an amenable number.

13111340321 is a deficient number, since it is larger than the sum of its proper divisors (771255331).

13111340321 is an equidigital number, since it uses as much as digits as its factorization.

13111340321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771255330.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 13111340321 its reverse (12304311131), we get a palindrome (25415651452).

The spelling of 13111340321 in words is "thirteen billion, one hundred eleven million, three hundred forty thousand, three hundred twenty-one".