111112021211 has 2 divisors, whose sum is σ = 111112021212. Its totient is φ = 111112021210.

The previous prime is 111112021183. The next prime is 111112021291. The reversal of 111112021211 is 112120211111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111112021211 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111112021291) 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, 55556010605 + 55556010606.

It is an arithmetic number, because the mean of its divisors is an integer number (55556010606).

Almost surely, 2^111112021211 is an apocalyptic number.

111112021211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112021211 is an equidigital number, since it uses as much as digits as its factorization.

111112021211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111112021211 its reverse (112120211111), we get a palindrome (223232232322).

The spelling of 111112021211 in words is "one hundred eleven billion, one hundred twelve million, twenty-one thousand, two hundred eleven".