12831020281 has 4 divisors (see below), whose sum is σ = 13388890752. Its totient is φ = 12273149812.

The previous prime is 12831020261. The next prime is 12831020291. The reversal of 12831020281 is 18202013821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12831020281 - 2⁹ = 12831019769 is a prime.

It is a super-2 number, since 2×12831020281² (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 (12831020261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278935201 + ... + 278935246.

It is an arithmetic number, because the mean of its divisors is an integer number (3347222688).

Almost surely, 2^12831020281 is an apocalyptic number.

It is an amenable number.

12831020281 is a deficient number, since it is larger than the sum of its proper divisors (557870471).

12831020281 is an equidigital number, since it uses as much as digits as its factorization.

12831020281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557870470.

The product of its (nonzero) digits is 1536, while the sum is 28.

The spelling of 12831020281 in words is "twelve billion, eight hundred thirty-one million, twenty thousand, two hundred eighty-one".