23021443221 has 8 divisors (see below), whose sum is σ = 35080294464. Its totient is φ = 13155110400.

The previous prime is 23021443219. The next prime is 23021443261. The reversal of 23021443221 is 12234412032.

It is a happy number.

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

It is not a de Polignac number, because 23021443221 - 2¹ = 23021443219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23021443191 and 23021443200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021443261) 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, 548129580 + ... + 548129621.

It is an arithmetic number, because the mean of its divisors is an integer number (4385036808).

Almost surely, 2^23021443221 is an apocalyptic number.

23021443221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23021443221 is a deficient number, since it is larger than the sum of its proper divisors (12058851243).

23021443221 is a wasteful number, since it uses less digits than its factorization.

23021443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096259211.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 23021443221 its reverse (12234412032), we get a palindrome (35255855253).

The spelling of 23021443221 in words is "twenty-three billion, twenty-one million, four hundred forty-three thousand, two hundred twenty-one".