12211323111221 has 8 divisors (see below), whose sum is σ = 13205679325440. Its totient is φ = 11224827420912.

The previous prime is 12211323111203. The next prime is 12211323111271. The reversal of 12211323111221 is 12211132311221.

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 12211323111221 - 2³⁰ = 12210249369397 is a prime.

It is a super-2 number, since 2×12211323111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211323111271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1965127745 + ... + 1965133958.

It is an arithmetic number, because the mean of its divisors is an integer number (1650709915680).

Almost surely, 2^{12211323111221} is an apocalyptic number.

It is an amenable number.

12211323111221 is a deficient number, since it is larger than the sum of its proper divisors (994356214219).

12211323111221 is a wasteful number, since it uses less digits than its factorization.

12211323111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930261955.

The product of its digits is 288, while the sum is 23.

Adding to 12211323111221 its reverse (12211132311221), we get a palindrome (24422455422442).

The spelling of 12211323111221 in words is "twelve trillion, two hundred eleven billion, three hundred twenty-three million, one hundred eleven thousand, two hundred twenty-one".