210102120200009 has 2 divisors, whose sum is σ = 210102120200010. Its totient is φ = 210102120200008.

The previous prime is 210102120199967. The next prime is 210102120200029. The reversal of 210102120200009 is 900002021201012.

It is a happy number.

It is an a-pointer prime, because the next prime (210102120200029) can be obtained adding 210102120200009 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193866080016400 + 16236040183609 = 13923580^2 + 4029397^2 .

It is a cyclic number.

It is not a de Polignac number, because 210102120200009 - 2⁴⁴ = 192509934155593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (210102120200029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105051060100004 + 105051060100005.

It is an arithmetic number, because the mean of its divisors is an integer number (105051060100005).

Almost surely, 2^{210102120200009} is an apocalyptic number.

It is an amenable number.

210102120200009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210102120200009 is an equidigital number, since it uses as much as digits as its factorization.

210102120200009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 210102120200009 in words is "two hundred ten trillion, one hundred two billion, one hundred twenty million, two hundred thousand, nine".