118931560221 has 4 divisors (see below), whose sum is σ = 158575413632. Its totient is φ = 79287706812.

The previous prime is 118931560217. The next prime is 118931560247. The reversal of 118931560221 is 122065139811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 118931560221 - 2² = 118931560217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118931560221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118931560211) 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, 19821926701 + ... + 19821926706.

It is an arithmetic number, because the mean of its divisors is an integer number (39643853408).

Almost surely, 2^118931560221 is an apocalyptic number.

It is an amenable number.

118931560221 is a deficient number, since it is larger than the sum of its proper divisors (39643853411).

118931560221 is an equidigital number, since it uses as much as digits as its factorization.

118931560221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39643853410.

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 118931560221 in words is "one hundred eighteen billion, nine hundred thirty-one million, five hundred sixty thousand, two hundred twenty-one".