111200202001991 has 2 divisors, whose sum is σ = 111200202001992. Its totient is φ = 111200202001990.

The previous prime is 111200202001937. The next prime is 111200202002017. The reversal of 111200202001991 is 199100202002111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111200202001991 - 2⁶ = 111200202001927 is a prime.

It is a super-3 number, since 3×111200202001991³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111200202003991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600101000995 + 55600101000996.

It is an arithmetic number, because the mean of its divisors is an integer number (55600101000996).

Almost surely, 2^{111200202001991} is an apocalyptic number.

111200202001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

111200202001991 is an equidigital number, since it uses as much as digits as its factorization.

111200202001991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 111200202001991 in words is "one hundred eleven trillion, two hundred billion, two hundred two million, one thousand, nine hundred ninety-one".