2221220211111 has 48 divisors (see below), whose sum is σ = 3506151411360. Its totient is φ = 1343869781760.

The previous prime is 2221220211079. The next prime is 2221220211113. The reversal of 2221220211111 is 1111120221222.

2221220211111 is a `hidden beast` number, since 2 + 221 + 220 + 211 + 1 + 11 = 666.

It is not a de Polignac number, because 2221220211111 - 2⁵ = 2221220211079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221220211113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 368419645 + ... + 368425673.

It is an arithmetic number, because the mean of its divisors is an integer number (73044821070).

Almost surely, 2^{2221220211111} is an apocalyptic number.

2221220211111 is a deficient number, since it is larger than the sum of its proper divisors (1284931200249).

2221220211111 is a wasteful number, since it uses less digits than its factorization.

2221220211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11856 (or 11853 counting only the distinct ones).

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

Adding to 2221220211111 its reverse (1111120221222), we get a palindrome (3332340432333).

The spelling of 2221220211111 in words is "two trillion, two hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred eleven".