210120012120017 has 2 divisors, whose sum is σ = 210120012120018. Its totient is φ = 210120012120016.

The previous prime is 210120012120001. The next prime is 210120012120043. The reversal of 210120012120017 is 710021210021012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146564533555456 + 63555478564561 = 12106384^2 + 7972169^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120012120017 - 2⁴ = 210120012120001 is a prime.

It is not a weakly prime, because it can be changed into another prime (210120012120917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060006060008 + 105060006060009.

It is an arithmetic number, because the mean of its divisors is an integer number (105060006060009).

Almost surely, 2^{210120012120017} is an apocalyptic number.

It is an amenable number.

210120012120017 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120012120017 is an equidigital number, since it uses as much as digits as its factorization.

210120012120017 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 210120012120017 its reverse (710021210021012), we get a palindrome (920141222141029).

The spelling of 210120012120017 in words is "two hundred ten trillion, one hundred twenty billion, twelve million, one hundred twenty thousand, seventeen".