12001210505 has 8 divisors (see below), whose sum is σ = 14898054600. Its totient is φ = 9269900416.

The previous prime is 12001210499. The next prime is 12001210531. The reversal of 12001210505 is 50501210021.

12001210505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 51222649 + 11949987856 = 7157^2 + 109316^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12001210505 - 2²² = 11997016201 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41383340 + ... + 41383629.

It is an arithmetic number, because the mean of its divisors is an integer number (1862256825).

Almost surely, 2^12001210505 is an apocalyptic number.

It is an amenable number.

12001210505 is a deficient number, since it is larger than the sum of its proper divisors (2896844095).

12001210505 is an equidigital number, since it uses as much as digits as its factorization.

12001210505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82767003.

The product of its (nonzero) digits is 100, while the sum is 17.

Adding to 12001210505 its reverse (50501210021), we get a palindrome (62502420526).

The spelling of 12001210505 in words is "twelve billion, one million, two hundred ten thousand, five hundred five".