22321001 has 4 divisors (see below), whose sum is σ = 22330452. Its totient is φ = 22311552.

The previous prime is 22320967. The next prime is 22321007. The reversal of 22321001 is 10012322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10896601 + 11424400 = 3301^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 22321001 - 2¹⁰ = 22319977 is a prime.

It is a super-3 number, since 3×22321001³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22321007) 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 3 ways as a sum of consecutive naturals, for example, 2261 + ... + 7053.

It is an arithmetic number, because the mean of its divisors is an integer number (5582613).

Almost surely, 2^22321001 is an apocalyptic number.

It is an amenable number.

22321001 is a deficient number, since it is larger than the sum of its proper divisors (9451).

22321001 is an equidigital number, since it uses as much as digits as its factorization.

22321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9450.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22321001 is about 4724.5106624919. The cubic root of 22321001 is about 281.5601723075.

Adding to 22321001 its reverse (10012322), we get a palindrome (32333323).

The spelling of 22321001 in words is "twenty-two million, three hundred twenty-one thousand, one".