12151223 has 4 divisors (see below), whose sum is σ = 13887120. Its totient is φ = 10415328.

The previous prime is 12151189. The next prime is 12151231. The reversal of 12151223 is 32215121.

It is a happy number.

12151223 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32215121 = 59 ⋅546019.

It is not a de Polignac number, because 12151223 - 2⁸ = 12150967 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 (12151273) 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, 867938 + ... + 867951.

It is an arithmetic number, because the mean of its divisors is an integer number (3471780).

Almost surely, 2^12151223 is an apocalyptic number.

12151223 is a deficient number, since it is larger than the sum of its proper divisors (1735897).

12151223 is an equidigital number, since it uses as much as digits as its factorization.

12151223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735896.

The product of its digits is 120, while the sum is 17.

The square root of 12151223 is about 3485.8604389734. The cubic root of 12151223 is about 229.9005430102.

Adding to 12151223 its reverse (32215121), we get a palindrome (44366344).

The spelling of 12151223 in words is "twelve million, one hundred fifty-one thousand, two hundred twenty-three".