12151634681 has 2 divisors, whose sum is σ = 12151634682. Its totient is φ = 12151634680.

The previous prime is 12151634641. The next prime is 12151634687. The reversal of 12151634681 is 18643615121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10568868025 + 1582766656 = 102805^2 + 39784^2 .

It is an emirp because it is prime and its reverse (18643615121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12151634681 is a prime.

It is a super-2 number, since 2×12151634681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12151634687) 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, 6075817340 + 6075817341.

It is an arithmetic number, because the mean of its divisors is an integer number (6075817341).

Almost surely, 2^12151634681 is an apocalyptic number.

It is an amenable number.

12151634681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12151634681 is an equidigital number, since it uses as much as digits as its factorization.

12151634681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The spelling of 12151634681 in words is "twelve billion, one hundred fifty-one million, six hundred thirty-four thousand, six hundred eighty-one".