12213005 has 24 divisors (see below), whose sum is σ = 17291520. Its totient is φ = 8255520.

The previous prime is 12213001. The next prime is 12213007. The reversal of 12213005 is 50031221.

It is a happy number.

It is not a de Polignac number, because 12213005 - 2² = 12213001 is a prime.

It is a super-2 number, since 2×12213005² = 298314982260050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19040 + ... + 19670.

It is an arithmetic number, because the mean of its divisors is an integer number (720480).

Almost surely, 2^12213005 is an apocalyptic number.

It is an amenable number.

12213005 is a deficient number, since it is larger than the sum of its proper divisors (5078515).

12213005 is an equidigital number, since it uses as much as digits as its factorization.

12213005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12213005 is about 3494.7110037884. The cubic root of 12213005 is about 230.2895219778.

Adding to 12213005 its reverse (50031221), we get a palindrome (62244226).

The spelling of 12213005 in words is "twelve million, two hundred thirteen thousand, five".