12030311257 has 2 divisors, whose sum is σ = 12030311258. Its totient is φ = 12030311256.

The previous prime is 12030311179. The next prime is 12030311281. The reversal of 12030311257 is 75211303021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10213932096 + 1816379161 = 101064^2 + 42619^2 .

It is a cyclic number.

It is not a de Polignac number, because 12030311257 - 2⁷ = 12030311129 is a prime.

It is not a weakly prime, because it can be changed into another prime (12030311957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015155628 + 6015155629.

It is an arithmetic number, because the mean of its divisors is an integer number (6015155629).

Almost surely, 2^12030311257 is an apocalyptic number.

It is an amenable number.

12030311257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12030311257 is an equidigital number, since it uses as much as digits as its factorization.

12030311257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

Adding to 12030311257 its reverse (75211303021), we get a palindrome (87241614278).

The spelling of 12030311257 in words is "twelve billion, thirty million, three hundred eleven thousand, two hundred fifty-seven".