13111118205 has 16 divisors (see below), whose sum is σ = 21173845824. Its totient is φ = 6927244160.

The previous prime is 13111118201. The next prime is 13111118213. The reversal of 13111118205 is 50281111131.

It is not a de Polignac number, because 13111118205 - 2² = 13111118201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111118201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4082856 + ... + 4086065.

It is an arithmetic number, because the mean of its divisors is an integer number (1323365364).

Almost surely, 2^13111118205 is an apocalyptic number.

13111118205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13111118205 is a deficient number, since it is larger than the sum of its proper divisors (8062727619).

13111118205 is a wasteful number, since it uses less digits than its factorization.

13111118205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8169036.

The product of its (nonzero) digits is 240, while the sum is 24.

Adding to 13111118205 its reverse (50281111131), we get a palindrome (63392229336).

The spelling of 13111118205 in words is "thirteen billion, one hundred eleven million, one hundred eighteen thousand, two hundred five".