12281020231 has 2 divisors, whose sum is σ = 12281020232. Its totient is φ = 12281020230.

The previous prime is 12281020207. The next prime is 12281020243. The reversal of 12281020231 is 13202018221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12281020231 - 2¹⁹ = 12280495943 is a prime.

It is a super-2 number, since 2×12281020231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12281020831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6140510115 + 6140510116.

It is an arithmetic number, because the mean of its divisors is an integer number (6140510116).

Almost surely, 2^12281020231 is an apocalyptic number.

12281020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12281020231 is an equidigital number, since it uses as much as digits as its factorization.

12281020231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 12281020231 its reverse (13202018221), we get a palindrome (25483038452).

The spelling of 12281020231 in words is "twelve billion, two hundred eighty-one million, twenty thousand, two hundred thirty-one".