22031232220171 has 2 divisors, whose sum is σ = 22031232220172. Its totient is φ = 22031232220170.

The previous prime is 22031232220099. The next prime is 22031232220219. The reversal of 22031232220171 is 17102223213022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22031232220171 is a prime.

It is not a weakly prime, because it can be changed into another prime (22031232220471) 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, 11015616110085 + 11015616110086.

It is an arithmetic number, because the mean of its divisors is an integer number (11015616110086).

Almost surely, 2^{22031232220171} is an apocalyptic number.

22031232220171 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031232220171 is an equidigital number, since it uses as much as digits as its factorization.

22031232220171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 22031232220171 its reverse (17102223213022), we get a palindrome (39133455433193).

The spelling of 22031232220171 in words is "twenty-two trillion, thirty-one billion, two hundred thirty-two million, two hundred twenty thousand, one hundred seventy-one".