2221212122211 has 16 divisors (see below), whose sum is σ = 3119657241600. Its totient is φ = 1401895869408.

The previous prime is 2221212122201. The next prime is 2221212122267. The reversal of 2221212122211 is 1122212121222.

It is not a de Polignac number, because 2221212122211 - 2¹⁵ = 2221212089443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221212122201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13458156 + ... + 13622201.

It is an arithmetic number, because the mean of its divisors is an integer number (194978577600).

Almost surely, 2^{2221212122211} is an apocalyptic number.

2221212122211 is a deficient number, since it is larger than the sum of its proper divisors (898445119389).

2221212122211 is a wasteful number, since it uses less digits than its factorization.

2221212122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27081818.

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

Adding to 2221212122211 its reverse (1122212121222), we get a palindrome (3343424243433).

It can be divided in two parts, 22212121222 and 11, that multiplied together give a palindrome (244333333442).

The spelling of 2221212122211 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, two hundred eleven".