2101220171 has 2 divisors, whose sum is σ = 2101220172. Its totient is φ = 2101220170.

The previous prime is 2101220167. The next prime is 2101220183. The reversal of 2101220171 is 1710221012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101220171 - 2² = 2101220167 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101280171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050610085 + 1050610086.

It is an arithmetic number, because the mean of its divisors is an integer number (1050610086).

Almost surely, 2^2101220171 is an apocalyptic number.

2101220171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101220171 is an equidigital number, since it uses as much as digits as its factorization.

2101220171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 2101220171 is about 45839.0681733388. The cubic root of 2101220171 is about 1280.8271368972.

Adding to 2101220171 its reverse (1710221012), we get a palindrome (3811441183).

The spelling of 2101220171 in words is "two billion, one hundred one million, two hundred twenty thousand, one hundred seventy-one".