118473731221 has 8 divisors (see below), whose sum is σ = 126241775640. Its totient is φ = 110794464768.

The previous prime is 118473731209. The next prime is 118473731249. The reversal of 118473731221 is 122137374811.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 54370580625 + 64103150596 = 233175^2 + 253186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 118473731221 - 2¹¹ = 118473729173 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 (118473231221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22191736 + ... + 22197073.

It is an arithmetic number, because the mean of its divisors is an integer number (15780221955).

Almost surely, 2^118473731221 is an apocalyptic number.

It is an amenable number.

118473731221 is a deficient number, since it is larger than the sum of its proper divisors (7768044419).

118473731221 is a wasteful number, since it uses less digits than its factorization.

118473731221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44388983.

The product of its digits is 56448, while the sum is 40.

The spelling of 118473731221 in words is "one hundred eighteen billion, four hundred seventy-three million, seven hundred thirty-one thousand, two hundred twenty-one".