135611123 has 4 divisors (see below), whose sum is σ = 135645720. Its totient is φ = 135576528.

The previous prime is 135611117. The next prime is 135611131. The reversal of 135611123 is 321116531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321116531 = 631 ⋅508901.

It is a cyclic number.

It is not a de Polignac number, because 135611123 - 2⁴ = 135611107 is a prime.

It is a super-2 number, since 2×135611123² = 36780753362642258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135617123) 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, 10538 + ... + 19551.

It is an arithmetic number, because the mean of its divisors is an integer number (33911430).

Almost surely, 2^135611123 is an apocalyptic number.

135611123 is a deficient number, since it is larger than the sum of its proper divisors (34597).

135611123 is an equidigital number, since it uses as much as digits as its factorization.

135611123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34596.

The product of its digits is 540, while the sum is 23.

The square root of 135611123 is about 11645.2188901712. The cubic root of 135611123 is about 513.7656971345.

Adding to 135611123 its reverse (321116531), we get a palindrome (456727654).

The spelling of 135611123 in words is "one hundred thirty-five million, six hundred eleven thousand, one hundred twenty-three".