210099109009 has 2 divisors, whose sum is σ = 210099109010. Its totient is φ = 210099109008.

The previous prime is 210099108971. The next prime is 210099109037. The reversal of 210099109009 is 900901990012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194792470609 + 15306638400 = 441353^2 + 123720^2 .

It is a cyclic number.

It is not a de Polignac number, because 210099109009 - 2⁷ = 210099108881 is a prime.

It is not a weakly prime, because it can be changed into another prime (210099109069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105049554504 + 105049554505.

It is an arithmetic number, because the mean of its divisors is an integer number (105049554505).

Almost surely, 2^210099109009 is an apocalyptic number.

It is an amenable number.

210099109009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210099109009 is an equidigital number, since it uses as much as digits as its factorization.

210099109009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 40.

The spelling of 210099109009 in words is "two hundred ten billion, ninety-nine million, one hundred nine thousand, nine".