22441021 has 4 divisors (see below), whose sum is σ = 22499100. Its totient is φ = 22382944.

The previous prime is 22440991. The next prime is 22441057. The reversal of 22441021 is 12014422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4284900 + 18156121 = 2070^2 + 4261^2 .

It is a cyclic number.

It is not a de Polignac number, because 22441021 - 2¹³ = 22432829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22440986 and 22441004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22441121) 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, 28456 + ... + 29233.

It is an arithmetic number, because the mean of its divisors is an integer number (5624775).

Almost surely, 2^22441021 is an apocalyptic number.

It is an amenable number.

22441021 is a deficient number, since it is larger than the sum of its proper divisors (58079).

22441021 is an equidigital number, since it uses as much as digits as its factorization.

22441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58078.

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

The square root of 22441021 is about 4737.1954783395. The cubic root of 22441021 is about 282.0639200877.

Adding to 22441021 its reverse (12014422), we get a palindrome (34455443).

The spelling of 22441021 in words is "twenty-two million, four hundred forty-one thousand, twenty-one".