11122221009 has 4 divisors (see below), whose sum is σ = 14829628016. Its totient is φ = 7414814004.

The previous prime is 11122221001. The next prime is 11122221023. The reversal of 11122221009 is 90012222111.

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 not a de Polignac number, because 11122221009 - 2³ = 11122221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11122221001) 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, 1853703499 + ... + 1853703504.

It is an arithmetic number, because the mean of its divisors is an integer number (3707407004).

Almost surely, 2^11122221009 is an apocalyptic number.

It is an amenable number.

11122221009 is a deficient number, since it is larger than the sum of its proper divisors (3707407007).

11122221009 is an equidigital number, since it uses as much as digits as its factorization.

11122221009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707407006.

The product of its (nonzero) digits is 144, while the sum is 21.

It can be divided in two parts, 111222 and 21009, that added together give a palindrome (132231).

The spelling of 11122221009 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, nine".