11022221209 has 4 divisors (see below), whose sum is σ = 11023212816. Its totient is φ = 11021229604.

The previous prime is 11022221149. The next prime is 11022221257. The reversal of 11022221209 is 90212222011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11022221209 - 2⁹ = 11022220697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11022221209.

It is not an unprimeable number, because it can be changed into a prime (11022281209) 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, 478939 + ... + 501424.

It is an arithmetic number, because the mean of its divisors is an integer number (2755803204).

Almost surely, 2^11022221209 is an apocalyptic number.

It is an amenable number.

11022221209 is a deficient number, since it is larger than the sum of its proper divisors (991607).

11022221209 is an equidigital number, since it uses as much as digits as its factorization.

11022221209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991606.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 11022221209 in words is "eleven billion, twenty-two million, two hundred twenty-one thousand, two hundred nine".