12216132724 has 48 divisors (see below), whose sum is σ = 22352737680. Its totient is φ = 5834465280.

The previous prime is 12216132703. The next prime is 12216132751. The reversal of 12216132724 is 42723161221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1904400 + 12214228324 = 1380^2 + 110518^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5354464 + ... + 5356744.

It is an arithmetic number, because the mean of its divisors is an integer number (465682035).

Almost surely, 2^12216132724 is an apocalyptic number.

It is an amenable number.

12216132724 is a deficient number, since it is larger than the sum of its proper divisors (10136604956).

12216132724 is a wasteful number, since it uses less digits than its factorization.

12216132724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788 (or 2786 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

Adding to 12216132724 its reverse (42723161221), we get a palindrome (54939293945).

The spelling of 12216132724 in words is "twelve billion, two hundred sixteen million, one hundred thirty-two thousand, seven hundred twenty-four".