212211212111 has 2 divisors, whose sum is σ = 212211212112. Its totient is φ = 212211212110.

The previous prime is 212211212099. The next prime is 212211212117. The reversal of 212211212111 is 111212112212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212211212111 - 2²² = 212207017807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212211212111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212211212117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105606055 + 106105606056.

It is an arithmetic number, because the mean of its divisors is an integer number (106105606056).

Almost surely, 2^212211212111 is an apocalyptic number.

212211212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211212111 is an equidigital number, since it uses as much as digits as its factorization.

212211212111 is an evil number, because the sum of its binary digits is even.

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

Adding to 212211212111 its reverse (111212112212), we get a palindrome (323423324323).

The spelling of 212211212111 in words is "two hundred twelve billion, two hundred eleven million, two hundred twelve thousand, one hundred eleven".