12134651521 has 2 divisors, whose sum is σ = 12134651522. Its totient is φ = 12134651520.

The previous prime is 12134651513. The next prime is 12134651531. The reversal of 12134651521 is 12515643121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12069219600 + 65431921 = 109860^2 + 8089^2 .

It is a cyclic number.

It is not a de Polignac number, because 12134651521 - 2³ = 12134651513 is a prime.

It is a super-2 number, since 2×12134651521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12134651531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6067325760 + 6067325761.

It is an arithmetic number, because the mean of its divisors is an integer number (6067325761).

Almost surely, 2^12134651521 is an apocalyptic number.

It is an amenable number.

12134651521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12134651521 is an equidigital number, since it uses as much as digits as its factorization.

12134651521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The spelling of 12134651521 in words is "twelve billion, one hundred thirty-four million, six hundred fifty-one thousand, five hundred twenty-one".