20221000171 has 2 divisors, whose sum is σ = 20221000172. Its totient is φ = 20221000170.

The previous prime is 20221000169. The next prime is 20221000231. The reversal of 20221000171 is 17100012202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20221000171 - 2¹ = 20221000169 is a prime.

Together with 20221000169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20221000141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110500085 + 10110500086.

It is an arithmetic number, because the mean of its divisors is an integer number (10110500086).

Almost surely, 2^20221000171 is an apocalyptic number.

20221000171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221000171 is an equidigital number, since it uses as much as digits as its factorization.

20221000171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 16.

Adding to 20221000171 its reverse (17100012202), we get a palindrome (37321012373).

The spelling of 20221000171 in words is "twenty billion, two hundred twenty-one million, one hundred seventy-one", and thus it is an aban number.