111101111121211 has 2 divisors, whose sum is σ = 111101111121212. Its totient is φ = 111101111121210.

The previous prime is 111101111121193. The next prime is 111101111121263. The reversal of 111101111121211 is 112121111101111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111101111121211 - 2³⁷ = 110963672167739 is a prime.

It is not a weakly prime, because it can be changed into another prime (111101111131211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550555560605 + 55550555560606.

It is an arithmetic number, because the mean of its divisors is an integer number (55550555560606).

Almost surely, 2^{111101111121211} is an apocalyptic number.

111101111121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101111121211 is an equidigital number, since it uses as much as digits as its factorization.

111101111121211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 16.

Adding to 111101111121211 its reverse (112121111101111), we get a palindrome (223222222222322).

The spelling of 111101111121211 in words is "one hundred eleven trillion, one hundred one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".