118191208811 has 4 divisors (see below), whose sum is σ = 127282840272. Its totient is φ = 109099577352.

The previous prime is 118191208801. The next prime is 118191208873. The reversal of 118191208811 is 118802191811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118802191811 = 2797 ⋅42474863.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118191208811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118191208801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545815711 + ... + 4545815736.

It is an arithmetic number, because the mean of its divisors is an integer number (31820710068).

Almost surely, 2^118191208811 is an apocalyptic number.

118191208811 is a deficient number, since it is larger than the sum of its proper divisors (9091631461).

118191208811 is an equidigital number, since it uses as much as digits as its factorization.

118191208811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091631460.

The product of its (nonzero) digits is 9216, while the sum is 41.

The spelling of 118191208811 in words is "one hundred eighteen billion, one hundred ninety-one million, two hundred eight thousand, eight hundred eleven".