12221432425 has 6 divisors (see below), whose sum is σ = 15154576238. Its totient is φ = 9777145920.

The previous prime is 12221432423. The next prime is 12221432429. The reversal of 12221432425 is 52423412221.

It can be written as a sum of positive squares in 3 ways, for example, as 196336144 + 12025096281 = 14012^2 + 109659^2 .

It is not a de Polignac number, because 12221432425 - 2¹ = 12221432423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221432393 and 12221432402.

It is not an unprimeable number, because it can be changed into a prime (12221432423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 244428624 + ... + 244428673.

Almost surely, 2^12221432425 is an apocalyptic number.

It is an amenable number.

12221432425 is a deficient number, since it is larger than the sum of its proper divisors (2933143813).

12221432425 is an equidigital number, since it uses as much as digits as its factorization.

12221432425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488857307 (or 488857302 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

Adding to 12221432425 its reverse (52423412221), we get a palindrome (64644844646).

The spelling of 12221432425 in words is "twelve billion, two hundred twenty-one million, four hundred thirty-two thousand, four hundred twenty-five".