12220210111221 has 24 divisors (see below), whose sum is σ = 20358119084160. Its totient is φ = 6918913191456.

The previous prime is 12220210111201. The next prime is 12220210111253. The reversal of 12220210111221 is 12211101202221.

12220210111221 is a `hidden beast` number, since 1 + 2 + 220 + 210 + 1 + 11 + 221 = 666.

It is not a de Polignac number, because 12220210111221 - 2¹⁹ = 12220209586933 is a prime.

It is a super-2 number, since 2×12220210111221² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12220210111194 and 12220210111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220210111201) 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 23 ways as a sum of consecutive naturals, for example, 889771065 + ... + 889784798.

It is an arithmetic number, because the mean of its divisors is an integer number (848254961840).

Almost surely, 2^{12220210111221} is an apocalyptic number.

It is an amenable number.

12220210111221 is a deficient number, since it is larger than the sum of its proper divisors (8137908972939).

12220210111221 is a wasteful number, since it uses less digits than its factorization.

12220210111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779555985 (or 1779555982 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12220210111221 its reverse (12211101202221), we get a palindrome (24431311313442).

The spelling of 12220210111221 in words is "twelve trillion, two hundred twenty billion, two hundred ten million, one hundred eleven thousand, two hundred twenty-one".