12215425424 has 10 divisors (see below), whose sum is σ = 23667386790. Its totient is φ = 6107712704.

The previous prime is 12215425379. The next prime is 12215425427. The reversal of 12215425424 is 42452451221.

It can be written as a sum of positive squares in only one way, i.e., 11942118400 + 273307024 = 109280^2 + 16532^2 .

It is not an unprimeable number, because it can be changed into a prime (12215425427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381732029 + ... + 381732060.

It is an arithmetic number, because the mean of its divisors is an integer number (2366738679).

Almost surely, 2^12215425424 is an apocalyptic number.

It is an amenable number.

12215425424 is a deficient number, since it is larger than the sum of its proper divisors (11451961366).

12215425424 is an equidigital number, since it uses as much as digits as its factorization.

12215425424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763464097 (or 763464091 counting only the distinct ones).

The product of its digits is 25600, while the sum is 32.

Adding to 12215425424 its reverse (42452451221), we get a palindrome (54667876645).

The spelling of 12215425424 in words is "twelve billion, two hundred fifteen million, four hundred twenty-five thousand, four hundred twenty-four".