12277158521 has 2 divisors, whose sum is σ = 12277158522. Its totient is φ = 12277158520.

The previous prime is 12277158511. The next prime is 12277158527. The reversal of 12277158521 is 12585177221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10208273296 + 2068885225 = 101036^2 + 45485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12277158521 is a prime.

It is not a weakly prime, because it can be changed into another prime (12277158527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6138579260 + 6138579261.

It is an arithmetic number, because the mean of its divisors is an integer number (6138579261).

Almost surely, 2^12277158521 is an apocalyptic number.

It is an amenable number.

12277158521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12277158521 is an equidigital number, since it uses as much as digits as its factorization.

12277158521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78400, while the sum is 41.

The spelling of 12277158521 in words is "twelve billion, two hundred seventy-seven million, one hundred fifty-eight thousand, five hundred twenty-one".