212101171 has 2 divisors, whose sum is σ = 212101172. Its totient is φ = 212101170.

The previous prime is 212101139. The next prime is 212101181. The reversal of 212101171 is 171101212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212101171 - 2⁵ = 212101139 is a prime.

It is not a weakly prime, because it can be changed into another prime (212101121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050585 + 106050586.

It is an arithmetic number, because the mean of its divisors is an integer number (106050586).

Almost surely, 2^212101171 is an apocalyptic number.

212101171 is a deficient number, since it is larger than the sum of its proper divisors (1).

212101171 is an equidigital number, since it uses as much as digits as its factorization.

212101171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 212101171 is about 14563.6935905697. The cubic root of 212101171 is about 596.3680321923.

Adding to 212101171 its reverse (171101212), we get a palindrome (383202383).

The spelling of 212101171 in words is "two hundred twelve million, one hundred one thousand, one hundred seventy-one".