11011220109 has 24 divisors (see below), whose sum is σ = 16499086240. Its totient is φ = 7338627216.

The previous prime is 11011220071. The next prime is 11011220111. The reversal of 11011220109 is 90102211011.

It is a happy number.

It is not a de Polignac number, because 11011220109 - 2¹³ = 11011211917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011220091 and 11011220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011220159) 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, 1521702 + ... + 1528920.

Almost surely, 2^11011220109 is an apocalyptic number.

It is an amenable number.

11011220109 is a deficient number, since it is larger than the sum of its proper divisors (5487866131).

11011220109 is an frugal number, since it uses more digits than its factorization.

11011220109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13511 (or 13499 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 11011220109 in words is "eleven billion, eleven million, two hundred twenty thousand, one hundred nine".