135423231111 has 24 divisors (see below), whose sum is σ = 223744270464. Its totient is φ = 77319467280.

The previous prime is 135423231037. The next prime is 135423231131. The reversal of 135423231111 is 111132324531.

135423231111 is a `hidden beast` number, since 1 + 3 + 5 + 423 + 231 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 135423231111 - 2¹⁵ = 135423198343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135423231131) 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, 830685 + ... + 980246.

It is an arithmetic number, because the mean of its divisors is an integer number (9322677936).

Almost surely, 2^135423231111 is an apocalyptic number.

135423231111 is a deficient number, since it is larger than the sum of its proper divisors (88321039353).

135423231111 is a wasteful number, since it uses less digits than its factorization.

135423231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812131 (or 1812128 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 135423231111 its reverse (111132324531), we get a palindrome (246555555642).

The spelling of 135423231111 in words is "one hundred thirty-five billion, four hundred twenty-three million, two hundred thirty-one thousand, one hundred eleven".