23021321 has 8 divisors (see below), whose sum is σ = 24071040. Its totient is φ = 21975712.

The previous prime is 23021291. The next prime is 23021333. The reversal of 23021321 is 12312032.

It is a happy number.

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 23021321 - 2¹⁴ = 23004937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23021296 and 23021305.

It is not an unprimeable number, because it can be changed into a prime (23021351) 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 7 ways as a sum of consecutive naturals, for example, 18701 + ... + 19893.

It is an arithmetic number, because the mean of its divisors is an integer number (3008880).

Almost surely, 2^23021321 is an apocalyptic number.

It is an amenable number.

23021321 is a deficient number, since it is larger than the sum of its proper divisors (1049719).

23021321 is a wasteful number, since it uses less digits than its factorization.

23021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 23021321 is about 4798.0538763128. The cubic root of 23021321 is about 284.4745463353.

Adding to 23021321 its reverse (12312032), we get a palindrome (35333353).

The spelling of 23021321 in words is "twenty-three million, twenty-one thousand, three hundred twenty-one".