210221202010009 has 2 divisors, whose sum is σ = 210221202010010. Its totient is φ = 210221202010008.

The previous prime is 210221202009979. The next prime is 210221202010091. The reversal of 210221202010009 is 900010202122012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204157803024400 + 6063398985609 = 14288380^2 + 2462397^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221202010009 - 2⁷ = 210221202009881 is a prime.

It is not a weakly prime, because it can be changed into another prime (210221202010709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110601005004 + 105110601005005.

It is an arithmetic number, because the mean of its divisors is an integer number (105110601005005).

Almost surely, 2^{210221202010009} is an apocalyptic number.

It is an amenable number.

210221202010009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221202010009 is an equidigital number, since it uses as much as digits as its factorization.

210221202010009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 210221202010009 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred two million, ten thousand, nine".