212212122111 has 36 divisors (see below), whose sum is σ = 342638903880. Its totient is φ = 126433480800.

The previous prime is 212212122091. The next prime is 212212122149. The reversal of 212212122111 is 111221212212.

212212122111 is a `hidden beast` number, since 21 + 221 + 212 + 211 + 1 = 666.

212212122111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212212122111 - 2⁵ = 212212122079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212122151) 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 35 ways as a sum of consecutive naturals, for example, 1587180 + ... + 1715681.

It is an arithmetic number, because the mean of its divisors is an integer number (9517747330).

Almost surely, 2^212212122111 is an apocalyptic number.

212212122111 is a deficient number, since it is larger than the sum of its proper divisors (130426781769).

212212122111 is a wasteful number, since it uses less digits than its factorization.

212212122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302948 (or 3302934 counting only the distinct ones).

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

Adding to 212212122111 its reverse (111221212212), we get a palindrome (323433334323).

It can be divided in two parts, 21221212211 and 1, that added together give a palindrome (21221212212).

The spelling of 212212122111 in words is "two hundred twelve billion, two hundred twelve million, one hundred twenty-two thousand, one hundred eleven".