12135445005 has 32 divisors (see below), whose sum is σ = 19500466176. Its totient is φ = 6444382784.

The previous prime is 12135445001. The next prime is 12135445093. The reversal of 12135445005 is 50054453121.

It is a cyclic number.

It is not a de Polignac number, because 12135445005 - 2² = 12135445001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135445001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4267114 + ... + 4269956.

It is an arithmetic number, because the mean of its divisors is an integer number (609389568).

Almost surely, 2^12135445005 is an apocalyptic number.

12135445005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12135445005 is a deficient number, since it is larger than the sum of its proper divisors (7365021171).

12135445005 is a wasteful number, since it uses less digits than its factorization.

12135445005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 12135445005 its reverse (50054453121), we get a palindrome (62189898126).

The spelling of 12135445005 in words is "twelve billion, one hundred thirty-five million, four hundred forty-five thousand, five".