711285225566221 has 2 divisors, whose sum is σ = 711285225566222. Its totient is φ = 711285225566220.

The previous prime is 711285225566197. The next prime is 711285225566257. The reversal of 711285225566221 is 122665522582117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506643331370121 + 204641894196100 = 22508739^2 + 14305310^2 .

It is a cyclic number.

It is not a de Polignac number, because 711285225566221 - 2³³ = 711276635631629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (711285225566261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355642612783110 + 355642612783111.

It is an arithmetic number, because the mean of its divisors is an integer number (355642612783111).

Almost surely, 2^{711285225566221} is an apocalyptic number.

It is an amenable number.

711285225566221 is a deficient number, since it is larger than the sum of its proper divisors (1).

711285225566221 is an equidigital number, since it uses as much as digits as its factorization.

711285225566221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064000, while the sum is 55.

The spelling of 711285225566221 in words is "seven hundred eleven trillion, two hundred eighty-five billion, two hundred twenty-five million, five hundred sixty-six thousand, two hundred twenty-one".