212321303022217 has 2 divisors, whose sum is σ = 212321303022218. Its totient is φ = 212321303022216.

The previous prime is 212321303022167. The next prime is 212321303022229. The reversal of 212321303022217 is 712220303123212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190303238961936 + 22018064060281 = 13795044^2 + 4692341^2 .

It is a cyclic number.

It is not a de Polignac number, because 212321303022217 - 2³⁹ = 211771547208329 is a prime.

It is not a weakly prime, because it can be changed into another prime (212321303023217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160651511108 + 106160651511109.

It is an arithmetic number, because the mean of its divisors is an integer number (106160651511109).

Almost surely, 2^{212321303022217} is an apocalyptic number.

It is an amenable number.

212321303022217 is a deficient number, since it is larger than the sum of its proper divisors (1).

212321303022217 is an equidigital number, since it uses as much as digits as its factorization.

212321303022217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 212321303022217 its reverse (712220303123212), we get a palindrome (924541606145429).

The spelling of 212321303022217 in words is "two hundred twelve trillion, three hundred twenty-one billion, three hundred three million, twenty-two thousand, two hundred seventeen".