12215425425 has 48 divisors (see below), whose sum is σ = 23516887680. Its totient is φ = 5478819840.

The previous prime is 12215425379. The next prime is 12215425427. The reversal of 12215425425 is 52452451221.

It is not a de Polignac number, because 12215425425 - 2¹¹ = 12215423377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12215425427) 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, 191680 + ... + 247329.

It is an arithmetic number, because the mean of its divisors is an integer number (489935160).

Almost surely, 2^12215425425 is an apocalyptic number.

12215425425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12215425425 is a deficient number, since it is larger than the sum of its proper divisors (11301462255).

12215425425 is a wasteful number, since it uses less digits than its factorization.

12215425425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439082 (or 439077 counting only the distinct ones).

The product of its digits is 32000, while the sum is 33.

Adding to 12215425425 its reverse (52452451221), we get a palindrome (64667876646).

The spelling of 12215425425 in words is "twelve billion, two hundred fifteen million, four hundred twenty-five thousand, four hundred twenty-five".