12135321634 has 8 divisors (see below), whose sum is σ = 18369982620. Its totient is φ = 6011994096.

The previous prime is 12135321629. The next prime is 12135321661. The reversal of 12135321634 is 43612353121.

It can be written as a sum of positive squares in 2 ways, for example, as 11745140625 + 390181009 = 108375^2 + 19753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12135321596 and 12135321605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27833089 + ... + 27833524.

Almost surely, 2^12135321634 is an apocalyptic number.

12135321634 is a deficient number, since it is larger than the sum of its proper divisors (6234660986).

12135321634 is a wasteful number, since it uses less digits than its factorization.

12135321634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55666724.

The product of its digits is 12960, while the sum is 31.

Adding to 12135321634 its reverse (43612353121), we get a palindrome (55747674755).

The spelling of 12135321634 in words is "twelve billion, one hundred thirty-five million, three hundred twenty-one thousand, six hundred thirty-four".