12221023 has 4 divisors (see below), whose sum is σ = 12238048. Its totient is φ = 12204000.

The previous prime is 12221021. The next prime is 12221029. The reversal of 12221023 is 32012221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32012221 = 227 ⋅141023.

It is a cyclic number.

It is not a de Polignac number, because 12221023 - 2¹ = 12221021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220994 and 12221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7386 + ... + 8887.

It is an arithmetic number, because the mean of its divisors is an integer number (3059512).

Almost surely, 2^12221023 is an apocalyptic number.

12221023 is a deficient number, since it is larger than the sum of its proper divisors (17025).

12221023 is an equidigital number, since it uses as much as digits as its factorization.

12221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17024.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12221023 is about 3495.8579776644. The cubic root of 12221023 is about 230.3399069966.

Adding to 12221023 its reverse (32012221), we get a palindrome (44233244).

The spelling of 12221023 in words is "twelve million, two hundred twenty-one thousand, twenty-three".