12216132725 has 6 divisors (see below), whose sum is σ = 15148004610. Its totient is φ = 9772906160.

The previous prime is 12216132703. The next prime is 12216132751. The reversal of 12216132725 is 52723161221.

It can be written as a sum of positive squares in 3 ways, for example, as 149989009 + 12066143716 = 12247^2 + 109846^2 .

It is not a de Polignac number, because 12216132725 - 2⁶ = 12216132661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12216132691 and 12216132700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 244322630 + ... + 244322679.

It is an arithmetic number, because the mean of its divisors is an integer number (2524667435).

Almost surely, 2^12216132725 is an apocalyptic number.

It is an amenable number.

12216132725 is a deficient number, since it is larger than the sum of its proper divisors (2931871885).

12216132725 is an equidigital number, since it uses as much as digits as its factorization.

12216132725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488645319 (or 488645314 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

Adding to 12216132725 its reverse (52723161221), we get a palindrome (64939293946).

The spelling of 12216132725 in words is "twelve billion, two hundred sixteen million, one hundred thirty-two thousand, seven hundred twenty-five".