12001211210005 has 4 divisors (see below), whose sum is σ = 14401453452012. Its totient is φ = 9600968968000.

The previous prime is 12001211209987. The next prime is 12001211210041. The reversal of 12001211210005 is 50001211210021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7687743291684 + 4313467918321 = 2772678^2 + 2076889^2 .

It is not a de Polignac number, because 12001211210005 - 2¹¹ = 12001211207957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200121120996 + ... + 1200121121005.

It is an arithmetic number, because the mean of its divisors is an integer number (3600363363003).

Almost surely, 2^{12001211210005} is an apocalyptic number.

It is an amenable number.

12001211210005 is a deficient number, since it is larger than the sum of its proper divisors (2400242242007).

12001211210005 is an equidigital number, since it uses as much as digits as its factorization.

12001211210005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400242242006.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 12001211210005 its sum of digits (16), we get a palindrome (12001211210021).

Adding to 12001211210005 its reverse (50001211210021), we get a palindrome (62002422420026).

The spelling of 12001211210005 in words is "twelve trillion, one billion, two hundred eleven million, two hundred ten thousand, five".