118972705466521 has 3 divisors (see below), whose sum is σ = 118972716373983. Its totient is φ = 118972694559060.

The previous prime is 118972705466497. The next prime is 118972705466533. The reversal of 118972705466521 is 125664507279811.

It is a happy number.

The square root of 118972705466521 is 10907461.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 84229461430921 + 34743244035600 = 9177661^2 + 5894340^2 .

It is a de Polignac number, because none of the positive numbers 2^k-118972705466521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118972705466221) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5453731 + ... + 16361191.

It is an arithmetic number, because the mean of its divisors is an integer number (39657572124661).

Almost surely, 2^{118972705466521} is an apocalyptic number.

118972705466521 is the 10907461-st square number.

118972705466521 is the 5453731-st centered octagonal number.

It is an amenable number.

118972705466521 is a deficient number, since it is larger than the sum of its proper divisors (10907462).

118972705466521 is an frugal number, since it uses more digits than its factorization.

118972705466521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21814922 (or 10907461 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 64.

The spelling of 118972705466521 in words is "one hundred eighteen trillion, nine hundred seventy-two billion, seven hundred five million, four hundred sixty-six thousand, five hundred twenty-one".