22009121 has 8 divisors (see below), whose sum is σ = 22310400. Its totient is φ = 21710160.

The previous prime is 22009109. The next prime is 22009147. The reversal of 22009121 is 12190022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22009121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22009121.

It is not an unprimeable number, because it can be changed into a prime (22009021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26135 + ... + 26963.

It is an arithmetic number, because the mean of its divisors is an integer number (2788800).

Almost surely, 2^22009121 is an apocalyptic number.

It is an amenable number.

22009121 is a deficient number, since it is larger than the sum of its proper divisors (301279).

22009121 is a wasteful number, since it uses less digits than its factorization.

22009121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 22009121 is about 4691.3879609344. The cubic root of 22009121 is about 280.2426510498.

Adding to 22009121 its reverse (12190022), we get a palindrome (34199143).

The spelling of 22009121 in words is "twenty-two million, nine thousand, one hundred twenty-one".