2221212222111 has 16 divisors (see below), whose sum is σ = 3024686016000. Its totient is φ = 1449274467648.

The previous prime is 2221212222107. The next prime is 2221212222169. The reversal of 2221212222111 is 1112222121222.

It is not a de Polignac number, because 2221212222111 - 2² = 2221212222107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221212220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9771595 + ... + 9996323.

It is an arithmetic number, because the mean of its divisors is an integer number (189042876000).

Almost surely, 2^{2221212222111} is an apocalyptic number.

2221212222111 is a deficient number, since it is larger than the sum of its proper divisors (803473793889).

2221212222111 is a wasteful number, since it uses less digits than its factorization.

2221212222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294878.

The product of its digits is 256, while the sum is 21.

Adding to 2221212222111 its reverse (1112222121222), we get a palindrome (3333434343333).

The spelling of 2221212222111 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred eleven".