13111330231 has 4 divisors (see below), whose sum is σ = 13390294752. Its totient is φ = 12832365712.

The previous prime is 13111330229. The next prime is 13111330261. The reversal of 13111330231 is 13203311131.

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 13111330231 - 2¹ = 13111330229 is a prime.

It is a super-2 number, since 2×13111330231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111330199 and 13111330208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111330201) 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, 139482190 + ... + 139482283.

It is an arithmetic number, because the mean of its divisors is an integer number (3347573688).

Almost surely, 2^13111330231 is an apocalyptic number.

13111330231 is a deficient number, since it is larger than the sum of its proper divisors (278964521).

13111330231 is an equidigital number, since it uses as much as digits as its factorization.

13111330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278964520.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 13111330231 its reverse (13203311131), we get a palindrome (26314641362).

The spelling of 13111330231 in words is "thirteen billion, one hundred eleven million, three hundred thirty thousand, two hundred thirty-one".