2221210202171 has 2 divisors, whose sum is σ = 2221210202172. Its totient is φ = 2221210202170.

The previous prime is 2221210202083. The next prime is 2221210202213. The reversal of 2221210202171 is 1712020121222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221210202171 is a prime.

It is a super-2 number, since 2×2221210202171² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2221210207171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110605101085 + 1110605101086.

It is an arithmetic number, because the mean of its divisors is an integer number (1110605101086).

Almost surely, 2^{2221210202171} is an apocalyptic number.

2221210202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221210202171 is an equidigital number, since it uses as much as digits as its factorization.

2221210202171 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2221210202171 its reverse (1712020121222), we get a palindrome (3933230323393).

The spelling of 2221210202171 in words is "two trillion, two hundred twenty-one billion, two hundred ten million, two hundred two thousand, one hundred seventy-one".