1201112111191 has 2 divisors, whose sum is σ = 1201112111192. Its totient is φ = 1201112111190.

The previous prime is 1201112111189. The next prime is 1201112111209. The reversal of 1201112111191 is 1911112111021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201112111191 - 2¹ = 1201112111189 is a prime.

It is a super-2 number, since 2×1201112111191² (a number of 25 digits) contains 22 as substring.

Together with 1201112111189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201112111791) 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, 600556055595 + 600556055596.

It is an arithmetic number, because the mean of its divisors is an integer number (600556055596).

Almost surely, 2^{1201112111191} is an apocalyptic number.

1201112111191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201112111191 is an equidigital number, since it uses as much as digits as its factorization.

1201112111191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 22.

The spelling of 1201112111191 in words is "one trillion, two hundred one billion, one hundred twelve million, one hundred eleven thousand, one hundred ninety-one".