111222011999911 has 2 divisors, whose sum is σ = 111222011999912. Its totient is φ = 111222011999910.

The previous prime is 111222011999897. The next prime is 111222012000053. The reversal of 111222011999911 is 119999110222111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111222011999911 - 2³⁷ = 111084573046439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111222011996911) 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, 55611005999955 + 55611005999956.

It is an arithmetic number, because the mean of its divisors is an integer number (55611005999956).

Almost surely, 2^{111222011999911} is an apocalyptic number.

111222011999911 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222011999911 is an equidigital number, since it uses as much as digits as its factorization.

111222011999911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 49.

The spelling of 111222011999911 in words is "one hundred eleven trillion, two hundred twenty-two billion, eleven million, nine hundred ninety-nine thousand, nine hundred eleven".