135121525315 has 16 divisors (see below), whose sum is σ = 185391299520. Its totient is φ = 92613870720.

The previous prime is 135121525283. The next prime is 135121525333. The reversal of 135121525315 is 513525121531.

It is a happy number.

It is not a de Polignac number, because 135121525315 - 2⁵ = 135121525283 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771316 + ... + 930145.

It is an arithmetic number, because the mean of its divisors is an integer number (11586956220).

Almost surely, 2^135121525315 is an apocalyptic number.

135121525315 is a deficient number, since it is larger than the sum of its proper divisors (50269774205).

135121525315 is a wasteful number, since it uses less digits than its factorization.

135121525315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703742.

The product of its digits is 22500, while the sum is 34.

Adding to 135121525315 its reverse (513525121531), we get a palindrome (648646646846).

The spelling of 135121525315 in words is "one hundred thirty-five billion, one hundred twenty-one million, five hundred twenty-five thousand, three hundred fifteen".