12216420425 has 48 divisors (see below), whose sum is σ = 17205660672. Its totient is φ = 8525606400.

The previous prime is 12216420421. The next prime is 12216420427. The reversal of 12216420425 is 52402461221.

It is not a de Polignac number, because 12216420425 - 2² = 12216420421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12216420421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 734552 + ... + 750998.

It is an arithmetic number, because the mean of its divisors is an integer number (358451264).

Almost surely, 2^12216420425 is an apocalyptic number.

It is an amenable number.

12216420425 is a deficient number, since it is larger than the sum of its proper divisors (4989240247).

12216420425 is a wasteful number, since it uses less digits than its factorization.

12216420425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16578 (or 16573 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 12216420425 its reverse (52402461221), we get a palindrome (64618881646).

The spelling of 12216420425 in words is "twelve billion, two hundred sixteen million, four hundred twenty thousand, four hundred twenty-five".