13111332113221 has 4 divisors (see below), whose sum is σ = 13111339507072. Its totient is φ = 13111324719372.

The previous prime is 13111332113147. The next prime is 13111332113261. The reversal of 13111332113221 is 12231123311131.

13111332113221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13111332113221 - 2⁹ = 13111332112709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111332113261) 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, 730060 + ... + 5172586.

It is an arithmetic number, because the mean of its divisors is an integer number (3277834876768).

Almost surely, 2^{13111332113221} is an apocalyptic number.

It is an amenable number.

13111332113221 is a deficient number, since it is larger than the sum of its proper divisors (7393851).

13111332113221 is an equidigital number, since it uses as much as digits as its factorization.

13111332113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7393850.

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

Adding to 13111332113221 its reverse (12231123311131), we get a palindrome (25342455424352).

The spelling of 13111332113221 in words is "thirteen trillion, one hundred eleven billion, three hundred thirty-two million, one hundred thirteen thousand, two hundred twenty-one".