11021003209 has 4 divisors (see below), whose sum is σ = 11023489300. Its totient is φ = 11018517120.

The previous prime is 11021003179. The next prime is 11021003251. The reversal of 11021003209 is 90230012011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8755719184 + 2265284025 = 93572^2 + 47595^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021003209 - 2²³ = 11012614601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11021003269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236384 + ... + 1245265.

It is an arithmetic number, because the mean of its divisors is an integer number (2755872325).

Almost surely, 2^11021003209 is an apocalyptic number.

It is an amenable number.

11021003209 is a deficient number, since it is larger than the sum of its proper divisors (2486091).

11021003209 is an equidigital number, since it uses as much as digits as its factorization.

11021003209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486090.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 11021003209 in words is "eleven billion, twenty-one million, three thousand, two hundred nine".