13011231311 has 4 divisors (see below), whose sum is σ = 14012095272. Its totient is φ = 12010367352.

The previous prime is 13011231287. The next prime is 13011231319. The reversal of 13011231311 is 11313211031.

13011231311 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 an emirpimes, since its reverse is a distinct semiprime: 11313211031 = 7121 ⋅1588711.

It is a cyclic number.

It is not a de Polignac number, because 13011231311 - 2²² = 13007037007 is a prime.

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 13011231311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011231319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500431961 + ... + 500431986.

It is an arithmetic number, because the mean of its divisors is an integer number (3503023818).

Almost surely, 2^13011231311 is an apocalyptic number.

13011231311 is a deficient number, since it is larger than the sum of its proper divisors (1000863961).

13011231311 is a wasteful number, since it uses less digits than its factorization.

13011231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000863960.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 13011231311 its reverse (11313211031), we get a palindrome (24324442342).

The spelling of 13011231311 in words is "thirteen billion, eleven million, two hundred thirty-one thousand, three hundred eleven".