210111202009 has 2 divisors, whose sum is σ = 210111202010. Its totient is φ = 210111202008.

The previous prime is 210111201941. The next prime is 210111202039. The reversal of 210111202009 is 900202111012.

It is a happy number.

210111202009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200842904025 + 9268297984 = 448155^2 + 96272^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111202009 - 2¹⁵ = 210111169241 is a prime.

It is not a weakly prime, because it can be changed into another prime (210111202039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055601004 + 105055601005.

It is an arithmetic number, because the mean of its divisors is an integer number (105055601005).

Almost surely, 2^210111202009 is an apocalyptic number.

It is an amenable number.

210111202009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111202009 is an equidigital number, since it uses as much as digits as its factorization.

210111202009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 210111202009 in words is "two hundred ten billion, one hundred eleven million, two hundred two thousand, nine".