1020212120171 has 2 divisors, whose sum is σ = 1020212120172. Its totient is φ = 1020212120170.

The previous prime is 1020212120099. The next prime is 1020212120173. The reversal of 1020212120171 is 1710212120201.

It is a happy number.

1020212120171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020212120171 is a prime.

Together with 1020212120173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1020212120173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106060085 + 510106060086.

It is an arithmetic number, because the mean of its divisors is an integer number (510106060086).

Almost surely, 2^{1020212120171} is an apocalyptic number.

1020212120171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020212120171 is an equidigital number, since it uses as much as digits as its factorization.

1020212120171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 1020212120171 its reverse (1710212120201), we get a palindrome (2730424240372).

The spelling of 1020212120171 in words is "one trillion, twenty billion, two hundred twelve million, one hundred twenty thousand, one hundred seventy-one".