22111009 has 4 divisors (see below), whose sum is σ = 22581504. Its totient is φ = 21640516.

The previous prime is 22111007. The next prime is 22111039. The reversal of 22111009 is 90011122.

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: 90011122 = 2 ⋅45005561.

It is a cyclic number.

It is not a de Polignac number, because 22111009 - 2¹ = 22111007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22110983 and 22111001.

It is not an unprimeable number, because it can be changed into a prime (22111007) 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, 235177 + ... + 235270.

It is an arithmetic number, because the mean of its divisors is an integer number (5645376).

Almost surely, 2^22111009 is an apocalyptic number.

It is an amenable number.

22111009 is a deficient number, since it is larger than the sum of its proper divisors (470495).

22111009 is an equidigital number, since it uses as much as digits as its factorization.

22111009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470494.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 22111009 is about 4702.2344688456. The cubic root of 22111009 is about 280.6744328702.

The spelling of 22111009 in words is "twenty-two million, one hundred eleven thousand, nine".