3516032816221 has 2 divisors, whose sum is σ = 3516032816222. Its totient is φ = 3516032816220.

The previous prime is 3516032816173. The next prime is 3516032816239. The reversal of 3516032816221 is 1226182306153.

3516032816221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3426900713721 + 89132102500 = 1851189^2 + 298550^2 .

It is a cyclic number.

It is not a de Polignac number, because 3516032816221 - 2¹⁵ = 3516032783453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3516032816251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1758016408110 + 1758016408111.

It is an arithmetic number, because the mean of its divisors is an integer number (1758016408111).

Almost surely, 2^{3516032816221} is an apocalyptic number.

It is an amenable number.

3516032816221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3516032816221 is an equidigital number, since it uses as much as digits as its factorization.

3516032816221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 3516032816221 in words is "three trillion, five hundred sixteen billion, thirty-two million, eight hundred sixteen thousand, two hundred twenty-one".