111111222210211 has 2 divisors, whose sum is σ = 111111222210212. Its totient is φ = 111111222210210.

The previous prime is 111111222210181. The next prime is 111111222210347. The reversal of 111111222210211 is 112012222111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111111222210211 - 2⁷ = 111111222210083 is a prime.

It is not a weakly prime, because it can be changed into another prime (111111232210211) 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, 55555611105105 + 55555611105106.

It is an arithmetic number, because the mean of its divisors is an integer number (55555611105106).

Almost surely, 2^{111111222210211} is an apocalyptic number.

111111222210211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111222210211 is an equidigital number, since it uses as much as digits as its factorization.

111111222210211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111111222210211 its reverse (112012222111111), we get a palindrome (223123444321322).

The spelling of 111111222210211 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred twenty-two million, two hundred ten thousand, two hundred eleven".