12030311281 has 2 divisors, whose sum is σ = 12030311282. Its totient is φ = 12030311280.

The previous prime is 12030311257. The next prime is 12030311327. The reversal of 12030311281 is 18211303021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9304531600 + 2725779681 = 96460^2 + 52209^2 .

It is a cyclic number.

It is not a de Polignac number, because 12030311281 - 2²⁹ = 11493440369 is a prime.

It is a super-2 number, since 2×12030311281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12030311981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015155640 + 6015155641.

It is an arithmetic number, because the mean of its divisors is an integer number (6015155641).

Almost surely, 2^12030311281 is an apocalyptic number.

It is an amenable number.

12030311281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12030311281 is an equidigital number, since it uses as much as digits as its factorization.

12030311281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 12030311281 in words is "twelve billion, thirty million, three hundred eleven thousand, two hundred eighty-one".