13531111011 has 24 divisors (see below), whose sum is σ = 21898020144. Its totient is φ = 7979031360.

The previous prime is 13531110961. The next prime is 13531111031. The reversal of 13531111011 is 11011113531.

13531111011 is a `hidden beast` number, since 13 + 531 + 1 + 110 + 11 = 666.

It is not a de Polignac number, because 13531111011 - 2⁶ = 13531110947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13531111031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1843336 + ... + 1850661.

It is an arithmetic number, because the mean of its divisors is an integer number (912417506).

Almost surely, 2^13531111011 is an apocalyptic number.

13531111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13531111011 is a deficient number, since it is larger than the sum of its proper divisors (8366909133).

13531111011 is a wasteful number, since it uses less digits than its factorization.

13531111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694051 (or 3694048 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 18.

Adding to 13531111011 its reverse (11011113531), we get a palindrome (24542224542).

The spelling of 13531111011 in words is "thirteen billion, five hundred thirty-one million, one hundred eleven thousand, eleven".