23021220321 has 24 divisors (see below), whose sum is σ = 36340383456. Its totient is φ = 13927439040.

The previous prime is 23021220289. The next prime is 23021220323. The reversal of 23021220321 is 12302212032.

23021220321 is a `hidden beast` number, since 230 + 212 + 203 + 21 = 666.

It is not a de Polignac number, because 23021220321 - 2⁵ = 23021220289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23021220294 and 23021220303.

It is not an unprimeable number, because it can be changed into a prime (23021220323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150780 + ... + 262253.

It is an arithmetic number, because the mean of its divisors is an integer number (1514182644).

Almost surely, 2^23021220321 is an apocalyptic number.

It is an amenable number.

23021220321 is a deficient number, since it is larger than the sum of its proper divisors (13319163135).

23021220321 is a wasteful number, since it uses less digits than its factorization.

23021220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413613 (or 413610 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23021220321 its reverse (12302212032), we get a palindrome (35323432353).

It can be divided in two parts, 23021 and 220321, that added together give a palindrome (243342).

The spelling of 23021220321 in words is "twenty-three billion, twenty-one million, two hundred twenty thousand, three hundred twenty-one".