13111232311321 has 4 divisors (see below), whose sum is σ = 13118512286644. Its totient is φ = 13103952336000.

The previous prime is 13111232311259. The next prime is 13111232311343. The reversal of 13111232311321 is 12311323211131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8570344075225 + 4540888236096 = 2927515^2 + 2130936^2 .

It is a cyclic number.

It is not a de Polignac number, because 13111232311321 - 2⁹ = 13111232310809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111232311421) 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, 3639984960 + ... + 3639988561.

It is an arithmetic number, because the mean of its divisors is an integer number (3279628071661).

Almost surely, 2^{13111232311321} is an apocalyptic number.

It is an amenable number.

13111232311321 is a deficient number, since it is larger than the sum of its proper divisors (7279975323).

13111232311321 is an equidigital number, since it uses as much as digits as its factorization.

13111232311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279975322.

The product of its digits is 648, while the sum is 25.

Adding to 13111232311321 its reverse (12311323211131), we get a palindrome (25422555522452).

The spelling of 13111232311321 in words is "thirteen trillion, one hundred eleven billion, two hundred thirty-two million, three hundred eleven thousand, three hundred twenty-one".