12220427 has 2 divisors, whose sum is σ = 12220428. Its totient is φ = 12220426.

The previous prime is 12220421. The next prime is 12220441. The reversal of 12220427 is 72402221.

It is a happy number.

12220427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12220427 - 2⁸ = 12220171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220399 and 12220408.

It is not a weakly prime, because it can be changed into another prime (12220421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110213 + 6110214.

It is an arithmetic number, because the mean of its divisors is an integer number (6110214).

Almost surely, 2^12220427 is an apocalyptic number.

12220427 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220427 is an equidigital number, since it uses as much as digits as its factorization.

12220427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 12220427 is about 3495.7727328875. The cubic root of 12220427 is about 230.3361624978.

Adding to 12220427 its reverse (72402221), we get a palindrome (84622648).

The spelling of 12220427 in words is "twelve million, two hundred twenty thousand, four hundred twenty-seven".