135123340342 has 4 divisors (see below), whose sum is σ = 202685010516. Its totient is φ = 67561670170.

The previous prime is 135123340321. The next prime is 135123340393. The reversal of 135123340342 is 243043321531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33780835084 + ... + 33780835087.

It is an arithmetic number, because the mean of its divisors is an integer number (50671252629).

Almost surely, 2^135123340342 is an apocalyptic number.

135123340342 is a deficient number, since it is larger than the sum of its proper divisors (67561670174).

135123340342 is an equidigital number, since it uses as much as digits as its factorization.

135123340342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67561670173.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 135123340342 its reverse (243043321531), we get a palindrome (378166661873).

The spelling of 135123340342 in words is "one hundred thirty-five billion, one hundred twenty-three million, three hundred forty thousand, three hundred forty-two".