210021020222009 has 2 divisors, whose sum is σ = 210021020222010. Its totient is φ = 210021020222008.

The previous prime is 210021020221993. The next prime is 210021020222029. The reversal of 210021020222009 is 900222020120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209278812126784 + 742208095225 = 14466472^2 + 861515^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021020222009 - 2⁴ = 210021020221993 is a prime.

It is not a weakly prime, because it can be changed into another prime (210021020222029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010510111004 + 105010510111005.

It is an arithmetic number, because the mean of its divisors is an integer number (105010510111005).

Almost surely, 2^{210021020222009} is an apocalyptic number.

It is an amenable number.

210021020222009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021020222009 is an equidigital number, since it uses as much as digits as its factorization.

210021020222009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 210021020222009 in words is "two hundred ten trillion, twenty-one billion, twenty million, two hundred twenty-two thousand, nine".