12215425427 has 2 divisors, whose sum is σ = 12215425428. Its totient is φ = 12215425426.

The previous prime is 12215425379. The next prime is 12215425433. The reversal of 12215425427 is 72452451221.

It is a strong prime.

It is an emirp because it is prime and its reverse (72452451221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12215425427 is a prime.

It is not a weakly prime, because it can be changed into another prime (12215425447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107712713 + 6107712714.

It is an arithmetic number, because the mean of its divisors is an integer number (6107712714).

Almost surely, 2^12215425427 is an apocalyptic number.

12215425427 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215425427 is an equidigital number, since it uses as much as digits as its factorization.

12215425427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44800, while the sum is 35.

Adding to 12215425427 its reverse (72452451221), we get a palindrome (84667876648).

The spelling of 12215425427 in words is "twelve billion, two hundred fifteen million, four hundred twenty-five thousand, four hundred twenty-seven".