12187784307122 has 54 divisors (see below), whose sum is σ = 19057236791229. Its totient is φ = 5845797294480.

The previous prime is 12187784307077. The next prime is 12187784307131. The reversal of 12187784307122 is 22170348778121.

It can be written as a sum of positive squares in 2 ways, for example, as 11560822814641 + 626961492481 = 3400121^2 + 791809^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2468581.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12298470047 + ... + 12298471037.

Almost surely, 2^{12187784307122} is an apocalyptic number.

12187784307122 is a deficient number, since it is larger than the sum of its proper divisors (6869452484107).

12187784307122 is an frugal number, since it uses more digits than its factorization.

12187784307122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 53.

The spelling of 12187784307122 in words is "twelve trillion, one hundred eighty-seven billion, seven hundred eighty-four million, three hundred seven thousand, one hundred twenty-two".