13111113332231 has 4 divisors (see below), whose sum is σ = 13127044211952. Its totient is φ = 13095182452512.

The previous prime is 13111113332201. The next prime is 13111113332237. The reversal of 13111113332231 is 13223331111131.

13111113332231 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.

It is a cyclic number.

It is not a de Polignac number, because 13111113332231 - 2⁶ = 13111113332167 is a prime.

It is a super-2 number, since 2×13111113332231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13111113332231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111113332237) 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, 7965438626 + ... + 7965440271.

It is an arithmetic number, because the mean of its divisors is an integer number (3281761052988).

Almost surely, 2^{13111113332231} is an apocalyptic number.

13111113332231 is a deficient number, since it is larger than the sum of its proper divisors (15930879721).

13111113332231 is an equidigital number, since it uses as much as digits as its factorization.

13111113332231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15930879720.

The product of its digits is 972, while the sum is 26.

Adding to 13111113332231 its reverse (13223331111131), we get a palindrome (26334444443362).

The spelling of 13111113332231 in words is "thirteen trillion, one hundred eleven billion, one hundred thirteen million, three hundred thirty-two thousand, two hundred thirty-one".