1222221100171 has 2 divisors, whose sum is σ = 1222221100172. Its totient is φ = 1222221100170.

The previous prime is 1222221100157. The next prime is 1222221100189. The reversal of 1222221100171 is 1710011222221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1710011222221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222221100171 - 2²³ = 1222212711563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222221100151) 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, 611110550085 + 611110550086.

It is an arithmetic number, because the mean of its divisors is an integer number (611110550086).

Almost surely, 2^{1222221100171} is an apocalyptic number.

1222221100171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222221100171 is an equidigital number, since it uses as much as digits as its factorization.

1222221100171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 1222221100171 its reverse (1710011222221), we get a palindrome (2932232322392).

The spelling of 1222221100171 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred thousand, one hundred seventy-one".