20012230171 has 2 divisors, whose sum is σ = 20012230172. Its totient is φ = 20012230170.

The previous prime is 20012230169. The next prime is 20012230243. The reversal of 20012230171 is 17103221002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012230171 - 2¹ = 20012230169 is a prime.

Together with 20012230169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20012230571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006115085 + 10006115086.

It is an arithmetic number, because the mean of its divisors is an integer number (10006115086).

Almost surely, 2^20012230171 is an apocalyptic number.

20012230171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012230171 is an equidigital number, since it uses as much as digits as its factorization.

20012230171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 20012230171 its reverse (17103221002), we get a palindrome (37115451173).

The spelling of 20012230171 in words is "twenty billion, twelve million, two hundred thirty thousand, one hundred seventy-one".