21115333061659 has 2 divisors, whose sum is σ = 21115333061660. Its totient is φ = 21115333061658.

The previous prime is 21115333061651. The next prime is 21115333061723. The reversal of 21115333061659 is 95616033351112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21115333061659 - 2³ = 21115333061651 is a prime.

It is not a weakly prime, because it can be changed into another prime (21115333061651) 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, 10557666530829 + 10557666530830.

It is an arithmetic number, because the mean of its divisors is an integer number (10557666530830).

Almost surely, 2^{21115333061659} is an apocalyptic number.

21115333061659 is a deficient number, since it is larger than the sum of its proper divisors (1).

21115333061659 is an equidigital number, since it uses as much as digits as its factorization.

21115333061659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 46.

The spelling of 21115333061659 in words is "twenty-one trillion, one hundred fifteen billion, three hundred thirty-three million, sixty-one thousand, six hundred fifty-nine".