2135011521525 has 12 divisors (see below), whose sum is σ = 3529885715712. Its totient is φ = 1138672811440.

The previous prime is 2135011521523. The next prime is 2135011521547. The reversal of 2135011521525 is 5251251105312.

It is not a de Polignac number, because 2135011521525 - 2¹ = 2135011521523 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135011521523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14233410069 + ... + 14233410218.

It is an arithmetic number, because the mean of its divisors is an integer number (294157142976).

Almost surely, 2^{2135011521525} is an apocalyptic number.

2135011521525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2135011521525 is a deficient number, since it is larger than the sum of its proper divisors (1394874194187).

2135011521525 is a wasteful number, since it uses less digits than its factorization.

2135011521525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28466820300 (or 28466820295 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

Adding to 2135011521525 its reverse (5251251105312), we get a palindrome (7386262626837).

The spelling of 2135011521525 in words is "two trillion, one hundred thirty-five billion, eleven million, five hundred twenty-one thousand, five hundred twenty-five".