20231323221 has 8 divisors (see below), whose sum is σ = 27316554880. Its totient is φ = 13316820192.

The previous prime is 20231323219. The next prime is 20231323247. The reversal of 20231323221 is 12232313202.

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 20231323221 - 2¹ = 20231323219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231323201) 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, 42681880 + ... + 42682353.

It is an arithmetic number, because the mean of its divisors is an integer number (3414569360).

Almost surely, 2^20231323221 is an apocalyptic number.

It is an amenable number.

20231323221 is a deficient number, since it is larger than the sum of its proper divisors (7085231659).

20231323221 is an equidigital number, since it uses as much as digits as its factorization.

20231323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85364315.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20231323221 its reverse (12232313202), we get a palindrome (32463636423).

The spelling of 20231323221 in words is "twenty billion, two hundred thirty-one million, three hundred twenty-three thousand, two hundred twenty-one".