135131442120 has 96 divisors (see below), whose sum is σ = 465011160120. Its totient is φ = 33915340800.

The previous prime is 135131442119. The next prime is 135131442151. The reversal of 135131442120 is 21244131531.

135131442120 is a `hidden beast` number, since 1 + 3 + 513 + 144 + 2 + 1 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 135051840036 + 79602084 = 367494^2 + 8922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11034031 + ... + 11046270.

Almost surely, 2^135131442120 is an apocalyptic number.

135131442120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135131442120 is an abundant number, since it is smaller than the sum of its proper divisors (329879718000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135131442120 is a wasteful number, since it uses less digits than its factorization.

135131442120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22080335 (or 22080328 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 135131442120 its reverse (21244131531), we get a palindrome (156375573651).

The spelling of 135131442120 in words is "one hundred thirty-five billion, one hundred thirty-one million, four hundred forty-two thousand, one hundred twenty".