12212147 has 2 divisors, whose sum is σ = 12212148. Its totient is φ = 12212146.

The previous prime is 12212143. The next prime is 12212159. The reversal of 12212147 is 74121221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12212147 - 2² = 12212143 is a prime.

It is not a weakly prime, because it can be changed into another prime (12212141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106073 + 6106074.

It is an arithmetic number, because the mean of its divisors is an integer number (6106074).

Almost surely, 2^12212147 is an apocalyptic number.

12212147 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212147 is an equidigital number, since it uses as much as digits as its factorization.

12212147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 20.

The square root of 12212147 is about 3494.5882447007. The cubic root of 12212147 is about 230.2841290098.

Adding to 12212147 its reverse (74121221), we get a palindrome (86333368).

It can be divided in two parts, 1221214 and 7, that added together give a palindrome (1221221).

The spelling of 12212147 in words is "twelve million, two hundred twelve thousand, one hundred forty-seven".