135242120243 has 8 divisors (see below), whose sum is σ = 140195422512. Its totient is φ = 130357139616.

The previous prime is 135242120231. The next prime is 135242120329. The reversal of 135242120243 is 342021242531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135242120243 - 2¹⁸ = 135241858099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135242120203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17076380 + ... + 17084297.

It is an arithmetic number, because the mean of its divisors is an integer number (17524427814).

Almost surely, 2^135242120243 is an apocalyptic number.

135242120243 is a deficient number, since it is larger than the sum of its proper divisors (4953302269).

135242120243 is a wasteful number, since it uses less digits than its factorization.

135242120243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34160821.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 135242120243 its reverse (342021242531), we get a palindrome (477263362774).

The spelling of 135242120243 in words is "one hundred thirty-five billion, two hundred forty-two million, one hundred twenty thousand, two hundred forty-three".