11001220209 has 24 divisors (see below), whose sum is σ = 18786980160. Its totient is φ = 6069637728.

The previous prime is 11001220159. The next prime is 11001220247. The reversal of 11001220209 is 90202210011.

It is not a de Polignac number, because 11001220209 - 2¹⁶ = 11001154673 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11001220191 and 11001220200.

It is not an unprimeable number, because it can be changed into a prime (11001222209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3008907 + ... + 3012560.

It is an arithmetic number, because the mean of its divisors is an integer number (782790840).

Almost surely, 2^11001220209 is an apocalyptic number.

It is an amenable number.

11001220209 is a deficient number, since it is larger than the sum of its proper divisors (7785759951).

11001220209 is a wasteful number, since it uses less digits than its factorization.

11001220209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6021509 (or 6021506 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 11001220209 in words is "eleven billion, one million, two hundred twenty thousand, two hundred nine".