2211220220171 has 2 divisors, whose sum is σ = 2211220220172. Its totient is φ = 2211220220170.

The previous prime is 2211220220141. The next prime is 2211220220281. The reversal of 2211220220171 is 1710220221122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211220220171 is a prime.

It is not a weakly prime, because it can be changed into another prime (2211220220141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105610110085 + 1105610110086.

It is an arithmetic number, because the mean of its divisors is an integer number (1105610110086).

Almost surely, 2^{2211220220171} is an apocalyptic number.

2211220220171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211220220171 is an equidigital number, since it uses as much as digits as its factorization.

2211220220171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 2211220220171 its reverse (1710220221122), we get a palindrome (3921440441293).

The spelling of 2211220220171 in words is "two trillion, two hundred eleven billion, two hundred twenty million, two hundred twenty thousand, one hundred seventy-one".