20210120131171 has 2 divisors, whose sum is σ = 20210120131172. Its totient is φ = 20210120131170.

The previous prime is 20210120131169. The next prime is 20210120131211. The reversal of 20210120131171 is 17113102101202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210120131171 - 2¹ = 20210120131169 is a prime.

Together with 20210120131169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20210120132171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105060065585 + 10105060065586.

It is an arithmetic number, because the mean of its divisors is an integer number (10105060065586).

Almost surely, 2^{20210120131171} is an apocalyptic number.

20210120131171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210120131171 is an equidigital number, since it uses as much as digits as its factorization.

20210120131171 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 22.

Adding to 20210120131171 its reverse (17113102101202), we get a palindrome (37323222232373).

The spelling of 20210120131171 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, one hundred thirty-one thousand, one hundred seventy-one".