12021223 has 4 divisors (see below), whose sum is σ = 12190608. Its totient is φ = 11851840.

The previous prime is 12021187. The next prime is 12021259. The reversal of 12021223 is 32212021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32212021 = 1201 ⋅26821.

It is an interprime number because it is at equal distance from previous prime (12021187) and next prime (12021259).

It is a cyclic number.

It is not a de Polignac number, because 12021223 - 2²¹ = 9924071 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 (12021923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84586 + ... + 84727.

It is an arithmetic number, because the mean of its divisors is an integer number (3047652).

Almost surely, 2^12021223 is an apocalyptic number.

12021223 is a deficient number, since it is larger than the sum of its proper divisors (169385).

12021223 is an equidigital number, since it uses as much as digits as its factorization.

12021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169384.

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

The square root of 12021223 is about 3467.1635381101. The cubic root of 12021223 is about 229.0777371900.

Adding to 12021223 its reverse (32212021), we get a palindrome (44233244).

The spelling of 12021223 in words is "twelve million, twenty-one thousand, two hundred twenty-three".