12031047281 has 8 divisors (see below), whose sum is σ = 13128373344. Its totient is φ = 10934320320.

The previous prime is 12031047241. The next prime is 12031047289. The reversal of 12031047281 is 18274013021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12031047281 is a prime.

It is a super-2 number, since 2×12031047281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031047289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107255 + ... + 188588.

It is an arithmetic number, because the mean of its divisors is an integer number (1641046668).

Almost surely, 2^12031047281 is an apocalyptic number.

12031047281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12031047281 is a deficient number, since it is larger than the sum of its proper divisors (1097326063).

12031047281 is a wasteful number, since it uses less digits than its factorization.

12031047281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299551.

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 12031047281 in words is "twelve billion, thirty-one million, forty-seven thousand, two hundred eighty-one".