23021020321 has 32 divisors (see below), whose sum is σ = 26504045568. Its totient is φ = 19830666240.

The previous prime is 23021020291. The next prime is 23021020403. The reversal of 23021020321 is 12302012032.

It is not a de Polignac number, because 23021020321 - 2²³ = 23012631713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23021020295 and 23021020304.

It is not an unprimeable number, because it can be changed into a prime (23021029321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4733431 + ... + 4738291.

It is an arithmetic number, because the mean of its divisors is an integer number (828251424).

Almost surely, 2^23021020321 is an apocalyptic number.

It is an amenable number.

23021020321 is a deficient number, since it is larger than the sum of its proper divisors (3483025247).

23021020321 is a wasteful number, since it uses less digits than its factorization.

23021020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23021020321 its reverse (12302012032), we get a palindrome (35323032353).

The spelling of 23021020321 in words is "twenty-three billion, twenty-one million, twenty thousand, three hundred twenty-one".