12654805361021 has 2 divisors, whose sum is σ = 12654805361022. Its totient is φ = 12654805361020.

The previous prime is 12654805360991. The next prime is 12654805361041. The reversal of 12654805361021 is 12016350845621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7352313595225 + 5302491765796 = 2711515^2 + 2302714^2 .

It is a cyclic number.

It is not a de Polignac number, because 12654805361021 - 2⁶ = 12654805360957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12654805361041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327402680510 + 6327402680511.

It is an arithmetic number, because the mean of its divisors is an integer number (6327402680511).

Almost surely, 2^{12654805361021} is an apocalyptic number.

It is an amenable number.

12654805361021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12654805361021 is an equidigital number, since it uses as much as digits as its factorization.

12654805361021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 12654805361021 in words is "twelve trillion, six hundred fifty-four billion, eight hundred five million, three hundred sixty-one thousand, twenty-one".