210202012111009 has 2 divisors, whose sum is σ = 210202012111010. Its totient is φ = 210202012111008.

The previous prime is 210202012110967. The next prime is 210202012111067. The reversal of 210202012111009 is 900111210202012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210082645315984 + 119366795025 = 14494228^2 + 345495^2 .

It is a cyclic number.

It is not a de Polignac number, because 210202012111009 - 2¹⁷ = 210202011979937 is a prime.

It is not a weakly prime, because it can be changed into another prime (210202012111109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105101006055504 + 105101006055505.

It is an arithmetic number, because the mean of its divisors is an integer number (105101006055505).

Almost surely, 2^{210202012111009} is an apocalyptic number.

It is an amenable number.

210202012111009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210202012111009 is an equidigital number, since it uses as much as digits as its factorization.

210202012111009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 210202012111009 in words is "two hundred ten trillion, two hundred two billion, twelve million, one hundred eleven thousand, nine".