22440121 has 12 divisors (see below), whose sum is σ = 25840944. Its totient is φ = 19323000.

The previous prime is 22440059. The next prime is 22440133. The reversal of 22440121 is 12104422.

It is not a de Polignac number, because 22440121 - 2⁷ = 22439993 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 22440095 and 22440104.

It is not an unprimeable number, because it can be changed into a prime (22440421) 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 11 ways as a sum of consecutive naturals, for example, 1146 + ... + 6796.

It is an arithmetic number, because the mean of its divisors is an integer number (2153412).

Almost surely, 2^22440121 is an apocalyptic number.

It is an amenable number.

22440121 is a deficient number, since it is larger than the sum of its proper divisors (3400823).

22440121 is a wasteful number, since it uses less digits than its factorization.

22440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5700 (or 5681 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 22440121 is about 4737.1004844736. The cubic root of 22440121 is about 282.0601493009.

Adding to 22440121 its reverse (12104422), we get a palindrome (34544543).

It can be divided in two parts, 224401 and 21, that added together give a palindrome (224422).

The spelling of 22440121 in words is "twenty-two million, four hundred forty thousand, one hundred twenty-one".