211222221110111 has 2 divisors, whose sum is σ = 211222221110112. Its totient is φ = 211222221110110.

The previous prime is 211222221109993. The next prime is 211222221110119. The reversal of 211222221110111 is 111011122222112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211222221110111 - 2²⁶ = 211222154001247 is a prime.

It is a super-2 number, since 2×211222221110111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211222221110119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611110555055 + 105611110555056.

It is an arithmetic number, because the mean of its divisors is an integer number (105611110555056).

Almost surely, 2^{211222221110111} is an apocalyptic number.

211222221110111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222221110111 is an equidigital number, since it uses as much as digits as its factorization.

211222221110111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211222221110111 its reverse (111011122222112), we get a palindrome (322233343332223).

The spelling of 211222221110111 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred ten thousand, one hundred eleven".