221122012171 has 2 divisors, whose sum is σ = 221122012172. Its totient is φ = 221122012170.

The previous prime is 221122012129. The next prime is 221122012183. The reversal of 221122012171 is 171210221122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221122012171 - 2²⁵ = 221088457739 is a prime.

It is not a weakly prime, because it can be changed into another prime (221122012471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561006085 + 110561006086.

It is an arithmetic number, because the mean of its divisors is an integer number (110561006086).

Almost surely, 2^221122012171 is an apocalyptic number.

221122012171 is a deficient number, since it is larger than the sum of its proper divisors (1).

221122012171 is an equidigital number, since it uses as much as digits as its factorization.

221122012171 is an evil number, because the sum of its binary digits is even.

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

Adding to 221122012171 its reverse (171210221122), we get a palindrome (392332233293).

The spelling of 221122012171 in words is "two hundred twenty-one billion, one hundred twenty-two million, twelve thousand, one hundred seventy-one".