12012346505 has 16 divisors (see below), whose sum is σ = 15560225280. Its totient is φ = 8875086528.

The previous prime is 12012346483. The next prime is 12012346531. The reversal of 12012346505 is 50564321021.

It is a cyclic number.

It is not a de Polignac number, because 12012346505 - 2³² = 7717379209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1797617 + ... + 1804286.

It is an arithmetic number, because the mean of its divisors is an integer number (972514080).

Almost surely, 2^12012346505 is an apocalyptic number.

It is an amenable number.

12012346505 is a deficient number, since it is larger than the sum of its proper divisors (3547878775).

12012346505 is a wasteful number, since it uses less digits than its factorization.

12012346505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601960.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 12012346505 its reverse (50564321021), we get a palindrome (62576667526).

The spelling of 12012346505 in words is "twelve billion, twelve million, three hundred forty-six thousand, five hundred five".