12030776668681 has 3 divisors (see below), whose sum is σ = 12030780137223. Its totient is φ = 12030773200140.

The previous prime is 12030776668639. The next prime is 12030776668693. The reversal of 12030776668681 is 18686667703021.

The square root of 12030776668681 is 3468541.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 11152320361081 + 878456307600 = 3339509^2 + 937260^2 .

It is not a de Polignac number, because 12030776668681 - 2¹¹ = 12030776666633 is a prime.

It is a super-2 number, since 2×12030776668681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12030776668381) 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 in 2 ways as a sum of consecutive naturals, for example, 1734271 + ... + 5202811.

It is an arithmetic number, because the mean of its divisors is an integer number (4010260045741).

Almost surely, 2^{12030776668681} is an apocalyptic number.

12030776668681 is the 3468541-st square number.

12030776668681 is the 1734271-st centered octagonal number.

It is an amenable number.

12030776668681 is a deficient number, since it is larger than the sum of its proper divisors (3468542).

12030776668681 is an frugal number, since it uses more digits than its factorization.

12030776668681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6937082 (or 3468541 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 12030776668681 in words is "twelve trillion, thirty billion, seven hundred seventy-six million, six hundred sixty-eight thousand, six hundred eighty-one".