212243550718721 has 2 divisors, whose sum is σ = 212243550718722. Its totient is φ = 212243550718720.

The previous prime is 212243550718697. The next prime is 212243550718733. The reversal of 212243550718721 is 127817055342212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182886269367025 + 29357281351696 = 13523545^2 + 5418236^2 .

It is a cyclic number.

It is not a de Polignac number, because 212243550718721 - 2¹⁰ = 212243550717697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212243550718721.

It is not a weakly prime, because it can be changed into another prime (212243550718321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106121775359360 + 106121775359361.

It is an arithmetic number, because the mean of its divisors is an integer number (106121775359361).

Almost surely, 2^{212243550718721} is an apocalyptic number.

It is an amenable number.

212243550718721 is a deficient number, since it is larger than the sum of its proper divisors (1).

212243550718721 is an equidigital number, since it uses as much as digits as its factorization.

212243550718721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 212243550718721 in words is "two hundred twelve trillion, two hundred forty-three billion, five hundred fifty million, seven hundred eighteen thousand, seven hundred twenty-one".