12149612281 has 2 divisors, whose sum is σ = 12149612282. Its totient is φ = 12149612280.

The previous prime is 12149612239. The next prime is 12149612317. The reversal of 12149612281 is 18221694121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11350984681 + 798627600 = 106541^2 + 28260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12149612281 is a prime.

It is a super-2 number, since 2×12149612281² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12149612281.

It is not a weakly prime, because it can be changed into another prime (12149612201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074806140 + 6074806141.

It is an arithmetic number, because the mean of its divisors is an integer number (6074806141).

Almost surely, 2^12149612281 is an apocalyptic number.

It is an amenable number.

12149612281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12149612281 is an equidigital number, since it uses as much as digits as its factorization.

12149612281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The spelling of 12149612281 in words is "twelve billion, one hundred forty-nine million, six hundred twelve thousand, two hundred eighty-one".