22001216321 has 8 divisors (see below), whose sum is σ = 25519535040. Its totient is φ = 18576719568.

The previous prime is 22001216287. The next prime is 22001216333. The reversal of 22001216321 is 12361210022.

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

It is a cyclic number.

It is not a de Polignac number, because 22001216321 - 2⁶ = 22001216257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001216293 and 22001216302.

It is not an unprimeable number, because it can be changed into a prime (22001216021) 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, 23454986 + ... + 23455923.

It is an arithmetic number, because the mean of its divisors is an integer number (3189941880).

Almost surely, 2^22001216321 is an apocalyptic number.

It is an amenable number.

22001216321 is a deficient number, since it is larger than the sum of its proper divisors (3518318719).

22001216321 is an equidigital number, since it uses as much as digits as its factorization.

22001216321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46910983.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 22001216321 its reverse (12361210022), we get a palindrome (34362426343).

The spelling of 22001216321 in words is "twenty-two billion, one million, two hundred sixteen thousand, three hundred twenty-one".