12212247 has 4 divisors (see below), whose sum is σ = 16283000. Its totient is φ = 8141496.

The previous prime is 12212237. The next prime is 12212279. The reversal of 12212247 is 74221221.

12212247 is digitally balanced in base 2, 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.

It is not a de Polignac number, because 12212247 - 2⁷ = 12212119 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212237) 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, 2035372 + ... + 2035377.

It is an arithmetic number, because the mean of its divisors is an integer number (4070750).

Almost surely, 2^12212247 is an apocalyptic number.

12212247 is a deficient number, since it is larger than the sum of its proper divisors (4070753).

12212247 is an equidigital number, since it uses as much as digits as its factorization.

12212247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070752.

The product of its digits is 448, while the sum is 21.

The square root of 12212247 is about 3494.6025525087. The cubic root of 12212247 is about 230.2847575738.

Adding to 12212247 its reverse (74221221), we get a palindrome (86433468).

The spelling of 12212247 in words is "twelve million, two hundred twelve thousand, two hundred forty-seven".