711773516221 has 4 divisors (see below), whose sum is σ = 711910691100. Its totient is φ = 711636341344.

The previous prime is 711773516131. The next prime is 711773516227. The reversal of 711773516221 is 122615377117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122615377117 = 47 ⋅2608837811.

It can be written as a sum of positive squares in 2 ways, for example, as 464018453721 + 247755062500 = 681189^2 + 497750^2 .

It is a cyclic number.

It is not a de Polignac number, because 711773516221 - 2¹¹ = 711773514173 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 (711773516227) 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, 68579656 + ... + 68590033.

It is an arithmetic number, because the mean of its divisors is an integer number (177977672775).

Almost surely, 2^711773516221 is an apocalyptic number.

It is an amenable number.

711773516221 is a deficient number, since it is larger than the sum of its proper divisors (137174879).

711773516221 is a wasteful number, since it uses less digits than its factorization.

711773516221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137174878.

The product of its digits is 123480, while the sum is 43.

The spelling of 711773516221 in words is "seven hundred eleven billion, seven hundred seventy-three million, five hundred sixteen thousand, two hundred twenty-one".