23021013321 has 20 divisors (see below), whose sum is σ = 34953183364. Its totient is φ = 15095743200.

The previous prime is 23021013317. The next prime is 23021013343. The reversal of 23021013321 is 12331012032.

23021013321 is a `hidden beast` number, since 230 + 2 + 101 + 332 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2697659721 + 20323353600 = 51939^2 + 142560^2 .

It is not a de Polignac number, because 23021013321 - 2² = 23021013317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23021013294 and 23021013303.

It is not an unprimeable number, because it can be changed into a prime (23021013311) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2324650 + ... + 2334531.

Almost surely, 2^23021013321 is an apocalyptic number.

It is an amenable number.

23021013321 is a deficient number, since it is larger than the sum of its proper divisors (11932170043).

23021013321 is an equidigital number, since it uses as much as digits as its factorization.

23021013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659254 (or 4659245 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23021013321 its reverse (12331012032), we get a palindrome (35352025353).

The spelling of 23021013321 in words is "twenty-three billion, twenty-one million, thirteen thousand, three hundred twenty-one".