12012221227 has 2 divisors, whose sum is σ = 12012221228. Its totient is φ = 12012221226.

The previous prime is 12012221197. The next prime is 12012221261. The reversal of 12012221227 is 72212221021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12012221227 - 2²³ = 12003832619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12012221198 and 12012221207.

It is not a weakly prime, because it can be changed into another prime (12012221297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006110613 + 6006110614.

It is an arithmetic number, because the mean of its divisors is an integer number (6006110614).

Almost surely, 2^12012221227 is an apocalyptic number.

12012221227 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012221227 is an equidigital number, since it uses as much as digits as its factorization.

12012221227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 12012221227 its reverse (72212221021), we get a palindrome (84224442248).

The spelling of 12012221227 in words is "twelve billion, twelve million, two hundred twenty-one thousand, two hundred twenty-seven".