12213143 has 4 divisors (see below), whose sum is σ = 12855960. Its totient is φ = 11570328.

The previous prime is 12213137. The next prime is 12213167. The reversal of 12213143 is 34131221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34131221 = 137 ⋅249133.

It is a cyclic number.

It is not a de Polignac number, because 12213143 - 2⁴ = 12213127 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 (12213193) 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, 321380 + ... + 321417.

It is an arithmetic number, because the mean of its divisors is an integer number (3213990).

Almost surely, 2^12213143 is an apocalyptic number.

12213143 is a deficient number, since it is larger than the sum of its proper divisors (642817).

12213143 is an equidigital number, since it uses as much as digits as its factorization.

12213143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642816.

The product of its digits is 144, while the sum is 17.

The square root of 12213143 is about 3494.7307478545. The cubic root of 12213143 is about 230.2903893547.

Adding to 12213143 its reverse (34131221), we get a palindrome (46344364).

The spelling of 12213143 in words is "twelve million, two hundred thirteen thousand, one hundred forty-three".