135120121342 has 16 divisors (see below), whose sum is σ = 204530158800. Its totient is φ = 66946199040.

The previous prime is 135120121337. The next prime is 135120121349. The reversal of 135120121342 is 243121021531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135120121349) 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, 602467 + ... + 795742.

It is an arithmetic number, because the mean of its divisors is an integer number (12783134925).

Almost surely, 2^135120121342 is an apocalyptic number.

135120121342 is a deficient number, since it is larger than the sum of its proper divisors (69410037458).

135120121342 is a wasteful number, since it uses less digits than its factorization.

135120121342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398651.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 135120121342 its reverse (243121021531), we get a palindrome (378241142873).

The spelling of 135120121342 in words is "one hundred thirty-five billion, one hundred twenty million, one hundred twenty-one thousand, three hundred forty-two".