12135136352 has 24 divisors (see below), whose sum is σ = 24929792496. Its totient is φ = 5803760512.

The previous prime is 12135136337. The next prime is 12135136357. The reversal of 12135136352 is 25363153121.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135136357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8243243 + ... + 8244714.

It is an arithmetic number, because the mean of its divisors is an integer number (1038741354).

Almost surely, 2^12135136352 is an apocalyptic number.

It is an amenable number.

12135136352 is an abundant number, since it is smaller than the sum of its proper divisors (12794656144).

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

12135136352 is a wasteful number, since it uses less digits than its factorization.

12135136352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16487990 (or 16487982 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

Adding to 12135136352 its reverse (25363153121), we get a palindrome (37498289473).

The spelling of 12135136352 in words is "twelve billion, one hundred thirty-five million, one hundred thirty-six thousand, three hundred fifty-two".