12221323023 has 16 divisors (see below), whose sum is σ = 20055504896. Its totient is φ = 6446412000.

The previous prime is 12221322991. The next prime is 12221323141. The reversal of 12221323023 is 32032312221.

It is a happy number.

It is not a de Polignac number, because 12221323023 - 2⁵ = 12221322991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221323423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22383103 + ... + 22383648.

It is an arithmetic number, because the mean of its divisors is an integer number (1253469056).

Almost surely, 2^12221323023 is an apocalyptic number.

12221323023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12221323023 is a deficient number, since it is larger than the sum of its proper divisors (7834181873).

12221323023 is a wasteful number, since it uses less digits than its factorization.

12221323023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44766774.

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

Adding to 12221323023 its reverse (32032312221), we get a palindrome (44253635244).

The spelling of 12221323023 in words is "twelve billion, two hundred twenty-one million, three hundred twenty-three thousand, twenty-three".