212112122111 has 2 divisors, whose sum is σ = 212112122112. Its totient is φ = 212112122110.

The previous prime is 212112122099. The next prime is 212112122129. The reversal of 212112122111 is 111221211212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212112122111 - 2²² = 212107927807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212112122111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212112112111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056061055 + 106056061056.

It is an arithmetic number, because the mean of its divisors is an integer number (106056061056).

Almost surely, 2^212112122111 is an apocalyptic number.

212112122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112122111 is an equidigital number, since it uses as much as digits as its factorization.

212112122111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 17.

Adding to 212112122111 its reverse (111221211212), we get a palindrome (323333333323).

The spelling of 212112122111 in words is "two hundred twelve billion, one hundred twelve million, one hundred twenty-two thousand, one hundred eleven".