11513533531111 has 2 divisors, whose sum is σ = 11513533531112. Its totient is φ = 11513533531110.

The previous prime is 11513533531109. The next prime is 11513533531193. The reversal of 11513533531111 is 11113533531511.

11513533531111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11513533531111 - 2¹ = 11513533531109 is a prime.

It is a super-2 number, since 2×11513533531111² (a number of 27 digits) contains 22 as substring.

Together with 11513533531109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11513533531711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5756766765555 + 5756766765556.

It is an arithmetic number, because the mean of its divisors is an integer number (5756766765556).

Almost surely, 2^{11513533531111} is an apocalyptic number.

11513533531111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11513533531111 is an equidigital number, since it uses as much as digits as its factorization.

11513533531111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10125, while the sum is 34.

The spelling of 11513533531111 in words is "eleven trillion, five hundred thirteen billion, five hundred thirty-three million, five hundred thirty-one thousand, one hundred eleven".