11020013209 has 4 divisors (see below), whose sum is σ = 11087620816. Its totient is φ = 10952405604.

The previous prime is 11020013189. The next prime is 11020013239. The reversal of 11020013209 is 90231002011.

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 11020013209 - 2⁵ = 11020013177 is a prime.

It is a super-2 number, since 2×11020013209² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11020013239) 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, 33803559 + ... + 33803884.

It is an arithmetic number, because the mean of its divisors is an integer number (2771905204).

Almost surely, 2^11020013209 is an apocalyptic number.

It is an amenable number.

11020013209 is a deficient number, since it is larger than the sum of its proper divisors (67607607).

11020013209 is an equidigital number, since it uses as much as digits as its factorization.

11020013209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67607606.

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

The spelling of 11020013209 in words is "eleven billion, twenty million, thirteen thousand, two hundred nine".