20231021223 has 48 divisors (see below), whose sum is σ = 33689124352. Its totient is φ = 11459880000.

The previous prime is 20231021219. The next prime is 20231021233. The reversal of 20231021223 is 32212013202.

It is not a de Polignac number, because 20231021223 - 2² = 20231021219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20231021196 and 20231021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231021233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5144568 + ... + 5148498.

Almost surely, 2^20231021223 is an apocalyptic number.

20231021223 is a deficient number, since it is larger than the sum of its proper divisors (13458103129).

20231021223 is a wasteful number, since it uses less digits than its factorization.

20231021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636 (or 4633 counting only the distinct ones).

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

Adding to 20231021223 its reverse (32212013202), we get a palindrome (52443034425).

The spelling of 20231021223 in words is "twenty billion, two hundred thirty-one million, twenty-one thousand, two hundred twenty-three".