212211122212111 has 32 divisors (see below), whose sum is σ = 236602742929920. Its totient is φ = 188717224550400.

The previous prime is 212211122212079. The next prime is 212211122212153. The reversal of 212211122212111 is 111212221112212.

It is a cyclic number.

It is not a de Polignac number, because 212211122212111 - 2⁵ = 212211122212079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211122212171) 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 31 ways as a sum of consecutive naturals, for example, 55270471 + ... + 58985143.

It is an arithmetic number, because the mean of its divisors is an integer number (7393835716560).

Almost surely, 2^{212211122212111} is an apocalyptic number.

212211122212111 is a deficient number, since it is larger than the sum of its proper divisors (24391620717809).

212211122212111 is a wasteful number, since it uses less digits than its factorization.

212211122212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715327.

The product of its digits is 128, while the sum is 22.

Adding to 212211122212111 its reverse (111212221112212), we get a palindrome (323423343324323).

The spelling of 212211122212111 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eleven".