12005135212 has 24 divisors (see below), whose sum is σ = 24417227520. Its totient is φ = 5057852880.

The previous prime is 12005135203. The next prime is 12005135251. The reversal of 12005135212 is 21253150021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3631864 + ... + 3635167.

It is an arithmetic number, because the mean of its divisors is an integer number (1017384480).

Almost surely, 2^12005135212 is an apocalyptic number.

It is an amenable number.

12005135212 is an abundant number, since it is smaller than the sum of its proper divisors (12412092308).

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

12005135212 is a wasteful number, since it uses less digits than its factorization.

12005135212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7267101 (or 7267099 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 12005135212 its reverse (21253150021), we get a palindrome (33258285233).

The spelling of 12005135212 in words is "twelve billion, five million, one hundred thirty-five thousand, two hundred twelve".