3213521907073 has 2 divisors, whose sum is σ = 3213521907074. Its totient is φ = 3213521907072.

The previous prime is 3213521907053. The next prime is 3213521907083. The reversal of 3213521907073 is 3707091253123.

3213521907073 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., 2762882244864 + 450639662209 = 1662192^2 + 671297^2 .

It is a cyclic number.

It is not a de Polignac number, because 3213521907073 - 2³³ = 3204931972481 is a prime.

It is not a weakly prime, because it can be changed into another prime (3213521907053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606760953536 + 1606760953537.

It is an arithmetic number, because the mean of its divisors is an integer number (1606760953537).

Almost surely, 2^{3213521907073} is an apocalyptic number.

It is an amenable number.

3213521907073 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213521907073 is an equidigital number, since it uses as much as digits as its factorization.

3213521907073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 3213521907073 in words is "three trillion, two hundred thirteen billion, five hundred twenty-one million, nine hundred seven thousand, seventy-three".