12221101012171 has 2 divisors, whose sum is σ = 12221101012172. Its totient is φ = 12221101012170.

The previous prime is 12221101012157. The next prime is 12221101012181. The reversal of 12221101012171 is 17121010112221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12221101012171 - 2⁹ = 12221101011659 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221101012181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110550506085 + 6110550506086.

It is an arithmetic number, because the mean of its divisors is an integer number (6110550506086).

Almost surely, 2^{12221101012171} is an apocalyptic number.

12221101012171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221101012171 is an equidigital number, since it uses as much as digits as its factorization.

12221101012171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 22.

Adding to 12221101012171 its reverse (17121010112221), we get a palindrome (29342111124392).

The spelling of 12221101012171 in words is "twelve trillion, two hundred twenty-one billion, one hundred one million, twelve thousand, one hundred seventy-one".