2201122111221 has 12 divisors (see below), whose sum is σ = 3468434842080. Its totient is φ = 1334013400680.

The previous prime is 2201122111219. The next prime is 2201122111261. The reversal of 2201122111221 is 1221112211022.

2201122111221 is a `hidden beast` number, since 220 + 1 + 1 + 221 + 1 + 1 + 221 = 666.

It is not a de Polignac number, because 2201122111221 - 2¹ = 2201122111219 is a prime.

It is a super-2 number, since 2×2201122111221² (a number of 25 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 = 2201122111194 and 2201122111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201122111261) 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 11 ways as a sum of consecutive naturals, for example, 11116778241 + ... + 11116778438.

It is an arithmetic number, because the mean of its divisors is an integer number (289036236840).

Almost surely, 2^{2201122111221} is an apocalyptic number.

It is an amenable number.

2201122111221 is a deficient number, since it is larger than the sum of its proper divisors (1267312730859).

2201122111221 is a wasteful number, since it uses less digits than its factorization.

2201122111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22233556696 (or 22233556693 counting only the distinct ones).

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

Adding to 2201122111221 its reverse (1221112211022), we get a palindrome (3422234322243).

The spelling of 2201122111221 in words is "two trillion, two hundred one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty-one".