111200120021191 has 2 divisors, whose sum is σ = 111200120021192. Its totient is φ = 111200120021190.

The previous prime is 111200120021183. The next prime is 111200120021227. The reversal of 111200120021191 is 191120021002111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111200120021191 - 2³ = 111200120021183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111200120021491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600060010595 + 55600060010596.

It is an arithmetic number, because the mean of its divisors is an integer number (55600060010596).

Almost surely, 2^{111200120021191} is an apocalyptic number.

111200120021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

111200120021191 is an equidigital number, since it uses as much as digits as its factorization.

111200120021191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 111200120021191 in words is "one hundred eleven trillion, two hundred billion, one hundred twenty million, twenty-one thousand, one hundred ninety-one".