135042123043 has 4 divisors (see below), whose sum is σ = 136944124848. Its totient is φ = 133140121240.

The previous prime is 135042123017. The next prime is 135042123053. The reversal of 135042123043 is 340321240531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340321240531 = 100361 ⋅3390971.

It is a cyclic number.

It is not a de Polignac number, because 135042123043 - 2¹⁷ = 135041991971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135042123053) 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, 951000796 + ... + 951000937.

It is an arithmetic number, because the mean of its divisors is an integer number (34236031212).

Almost surely, 2^135042123043 is an apocalyptic number.

135042123043 is a deficient number, since it is larger than the sum of its proper divisors (1902001805).

135042123043 is an equidigital number, since it uses as much as digits as its factorization.

135042123043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902001804.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 135042123043 its reverse (340321240531), we get a palindrome (475363363574).

The spelling of 135042123043 in words is "one hundred thirty-five billion, forty-two million, one hundred twenty-three thousand, forty-three".