20020021001171 has 2 divisors, whose sum is σ = 20020021001172. Its totient is φ = 20020021001170.

The previous prime is 20020021001119. The next prime is 20020021001303. The reversal of 20020021001171 is 17110012002002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20020021001171 - 2⁶ = 20020021001107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20020021001471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010010500585 + 10010010500586.

It is an arithmetic number, because the mean of its divisors is an integer number (10010010500586).

Almost surely, 2^{20020021001171} is an apocalyptic number.

20020021001171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020021001171 is an equidigital number, since it uses as much as digits as its factorization.

20020021001171 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 17.

Adding to 20020021001171 its reverse (17110012002002), we get a palindrome (37130033003173).

The spelling of 20020021001171 in words is "twenty trillion, twenty billion, twenty-one million, one thousand, one hundred seventy-one".