12001111221211 has 16 divisors (see below), whose sum is σ = 13814594214400. Its totient is φ = 10212391778688.

The previous prime is 12001111221149. The next prime is 12001111221241. The reversal of 12001111221211 is 11212211110021.

It is a cyclic number.

It is not a de Polignac number, because 12001111221211 - 2¹⁹ = 12001110696923 is a prime.

It is a super-3 number, since 3×12001111221211³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12001111221241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42313570 + ... + 42596248.

It is an arithmetic number, because the mean of its divisors is an integer number (863412138400).

Almost surely, 2^{12001111221211} is an apocalyptic number.

12001111221211 is a deficient number, since it is larger than the sum of its proper divisors (1813482993189).

12001111221211 is a wasteful number, since it uses less digits than its factorization.

12001111221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326458.

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

Adding to 12001111221211 its reverse (11212211110021), we get a palindrome (23213322331232).

The spelling of 12001111221211 in words is "twelve trillion, one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred eleven".