212216705171 has 2 divisors, whose sum is σ = 212216705172. Its totient is φ = 212216705170.

The previous prime is 212216705167. The next prime is 212216705179. The reversal of 212216705171 is 171507612212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212216705171 - 2² = 212216705167 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (212216705179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106108352585 + 106108352586.

It is an arithmetic number, because the mean of its divisors is an integer number (106108352586).

Almost surely, 2^212216705171 is an apocalyptic number.

212216705171 is a deficient number, since it is larger than the sum of its proper divisors (1).

212216705171 is an equidigital number, since it uses as much as digits as its factorization.

212216705171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 35.

The spelling of 212216705171 in words is "two hundred twelve billion, two hundred sixteen million, seven hundred five thousand, one hundred seventy-one".