12001213220111 has 4 divisors (see below), whose sum is σ = 12111316093800. Its totient is φ = 11891110346424.

The previous prime is 12001213220071. The next prime is 12001213220147. The reversal of 12001213220111 is 11102231210021.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001213220111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12001213220111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001213220011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 55051436681 + ... + 55051436898.

It is an arithmetic number, because the mean of its divisors is an integer number (3027829023450).

Almost surely, 2^{12001213220111} is an apocalyptic number.

12001213220111 is a deficient number, since it is larger than the sum of its proper divisors (110102873689).

12001213220111 is a wasteful number, since it uses less digits than its factorization.

12001213220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110102873688.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12001213220111 its reverse (11102231210021), we get a palindrome (23103444430132).

The spelling of 12001213220111 in words is "twelve trillion, one billion, two hundred thirteen million, two hundred twenty thousand, one hundred eleven".