12630031281 has 24 divisors (see below), whose sum is σ = 21242969280. Its totient is φ = 7080986016.

The previous prime is 12630031279. The next prime is 12630031283. The reversal of 12630031281 is 18213003621.

It is a happy number.

12630031281 is a `hidden beast` number, since 1 + 2 + 630 + 0 + 3 + 1 + 28 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12630031279) and next prime (12630031283).

It is not a de Polignac number, because 12630031281 - 2¹ = 12630031279 is a prime.

It is a super-2 number, since 2×12630031281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12630031283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1887951 + ... + 1894628.

It is an arithmetic number, because the mean of its divisors is an integer number (885123720).

Almost surely, 2^12630031281 is an apocalyptic number.

It is an amenable number.

12630031281 is a deficient number, since it is larger than the sum of its proper divisors (8612937999).

12630031281 is a wasteful number, since it uses less digits than its factorization.

12630031281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782645 (or 3782642 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 12630031281 in words is "twelve billion, six hundred thirty million, thirty-one thousand, two hundred eighty-one".