11021020020209 has 2 divisors, whose sum is σ = 11021020020210. Its totient is φ = 11021020020208.

The previous prime is 11021020020193. The next prime is 11021020020217. The reversal of 11021020020209 is 90202002012011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8951585286400 + 2069434733809 = 2991920^2 + 1438553^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021020020209 - 2⁴ = 11021020020193 is a prime.

It is not a weakly prime, because it can be changed into another prime (11021020020709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510510010104 + 5510510010105.

It is an arithmetic number, because the mean of its divisors is an integer number (5510510010105).

Almost surely, 2^{11021020020209} is an apocalyptic number.

It is an amenable number.

11021020020209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021020020209 is an equidigital number, since it uses as much as digits as its factorization.

11021020020209 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 20.

The spelling of 11021020020209 in words is "eleven trillion, twenty-one billion, twenty million, twenty thousand, two hundred nine".