2211102220221 has 16 divisors (see below), whose sum is σ = 3317171641600. Its totient is φ = 1455409054944.

The previous prime is 2211102220199. The next prime is 2211102220253. The reversal of 2211102220221 is 1220222011122.

It is a happy number.

2211102220221 is a `hidden beast` number, since 2 + 211 + 10 + 2 + 220 + 221 = 666.

It is not a de Polignac number, because 2211102220221 - 2¹⁰ = 2211102219197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211102220194 and 2211102220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211102220021) 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, 518305936 + ... + 518310201.

It is an arithmetic number, because the mean of its divisors is an integer number (207323227600).

Almost surely, 2^{2211102220221} is an apocalyptic number.

It is an amenable number.

2211102220221 is a deficient number, since it is larger than the sum of its proper divisors (1106069421379).

2211102220221 is a wasteful number, since it uses less digits than its factorization.

2211102220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036616225 (or 1036616219 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2211102220221 its reverse (1220222011122), we get a palindrome (3431324231343).

The spelling of 2211102220221 in words is "two trillion, two hundred eleven billion, one hundred two million, two hundred twenty thousand, two hundred twenty-one".