1198209191191 has 4 divisors (see below), whose sum is σ = 1198765723392. Its totient is φ = 1197652658992.

The previous prime is 1198209191189. The next prime is 1198209191219. The reversal of 1198209191191 is 1911919028911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1198209191191 - 2¹ = 1198209191189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198209191131) 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 in 3 ways as a sum of consecutive naturals, for example, 278262871 + ... + 278267176.

It is an arithmetic number, because the mean of its divisors is an integer number (299691430848).

Almost surely, 2^{1198209191191} is an apocalyptic number.

1198209191191 is a deficient number, since it is larger than the sum of its proper divisors (556532201).

1198209191191 is an equidigital number, since it uses as much as digits as its factorization.

1198209191191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556532200.

The product of its (nonzero) digits is 104976, while the sum is 52.

The spelling of 1198209191191 in words is "one trillion, one hundred ninety-eight billion, two hundred nine million, one hundred ninety-one thousand, one hundred ninety-one".