22561121 has 8 divisors (see below), whose sum is σ = 24741984. Its totient is φ = 20401920.

The previous prime is 22561117. The next prime is 22561129. The reversal of 22561121 is 12116522.

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

It is not a de Polignac number, because 22561121 - 2² = 22561117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22561093 and 22561102.

It is not an unprimeable number, because it can be changed into a prime (22561129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3191 + ... + 7436.

It is an arithmetic number, because the mean of its divisors is an integer number (3092748).

Almost surely, 2^22561121 is an apocalyptic number.

It is an amenable number.

22561121 is a deficient number, since it is larger than the sum of its proper divisors (2180863).

22561121 is a wasteful number, since it uses less digits than its factorization.

22561121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10831.

The product of its digits is 240, while the sum is 20.

The square root of 22561121 is about 4749.8548398872. The cubic root of 22561121 is about 282.5662089314.

Adding to 22561121 its reverse (12116522), we get a palindrome (34677643).

The spelling of 22561121 in words is "twenty-two million, five hundred sixty-one thousand, one hundred twenty-one".