12340221 has 12 divisors (see below), whose sum is σ = 16871616. Its totient is φ = 8022880.

The previous prime is 12340199. The next prime is 12340271. The reversal of 12340221 is 12204321.

It is not a de Polignac number, because 12340221 - 2⁶ = 12340157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12340221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3820 + ... + 6266.

It is an arithmetic number, because the mean of its divisors is an integer number (1405968).

Almost surely, 2^12340221 is an apocalyptic number.

It is an amenable number.

12340221 is a deficient number, since it is larger than the sum of its proper divisors (4531395).

12340221 is an equidigital number, since it uses as much as digits as its factorization.

12340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532 (or 2491 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12340221 is about 3512.8650699963. The cubic root of 12340221 is about 231.0863603935.

Adding to 12340221 its reverse (12204321), we get a palindrome (24544542).

It can be divided in two parts, 12340 and 221, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 12340221 in words is "twelve million, three hundred forty thousand, two hundred twenty-one".