135111911 has 4 divisors (see below), whose sum is σ = 147394824. Its totient is φ = 122829000.

The previous prime is 135111877. The next prime is 135111917. The reversal of 135111911 is 119111531.

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 135111911 - 2¹⁰ = 135110887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135111917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6141440 + ... + 6141461.

It is an arithmetic number, because the mean of its divisors is an integer number (36848706).

Almost surely, 2^135111911 is an apocalyptic number.

135111911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135111911 is a deficient number, since it is larger than the sum of its proper divisors (12282913).

135111911 is a wasteful number, since it uses less digits than its factorization.

135111911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12282912.

The product of its digits is 135, while the sum is 23.

The square root of 135111911 is about 11623.7649236381. The cubic root of 135111911 is about 513.1344967910.

The spelling of 135111911 in words is "one hundred thirty-five million, one hundred eleven thousand, nine hundred eleven".