12135235225525 has 48 divisors (see below), whose sum is σ = 15517026489600. Its totient is φ = 9410321007360.

The previous prime is 12135235225507. The next prime is 12135235225543. The reversal of 12135235225525 is 52552253253121.

It is an interprime number because it is at equal distance from previous prime (12135235225507) and next prime (12135235225543).

It is not a de Polignac number, because 12135235225525 - 2⁷ = 12135235225397 is a prime.

It is a super-2 number, since 2×12135235225525² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88140639 + ... + 88278211.

It is an arithmetic number, because the mean of its divisors is an integer number (323271385200).

Almost surely, 2^{12135235225525} is an apocalyptic number.

It is an amenable number.

12135235225525 is a deficient number, since it is larger than the sum of its proper divisors (3381791264075).

12135235225525 is a wasteful number, since it uses less digits than its factorization.

12135235225525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138478 (or 138473 counting only the distinct ones).

The product of its digits is 900000, while the sum is 43.

Adding to 12135235225525 its reverse (52552253253121), we get a palindrome (64687488478646).

The spelling of 12135235225525 in words is "twelve trillion, one hundred thirty-five billion, two hundred thirty-five million, two hundred twenty-five thousand, five hundred twenty-five".