11100120209 has 4 divisors (see below), whose sum is σ = 11100501360. Its totient is φ = 11099739060.

The previous prime is 11100120151. The next prime is 11100120217. The reversal of 11100120209 is 90202100111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90202100111 = 73 ⋅1235645207.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11100120209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11100150209) 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, 142919 + ... + 206460.

It is an arithmetic number, because the mean of its divisors is an integer number (2775125340).

Almost surely, 2^11100120209 is an apocalyptic number.

It is an amenable number.

11100120209 is a deficient number, since it is larger than the sum of its proper divisors (381151).

11100120209 is an equidigital number, since it uses as much as digits as its factorization.

11100120209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381150.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 11100120209 in words is "eleven billion, one hundred million, one hundred twenty thousand, two hundred nine".