3221741396641 has 2 divisors, whose sum is σ = 3221741396642. Its totient is φ = 3221741396640.

The previous prime is 3221741396639. The next prime is 3221741396681. The reversal of 3221741396641 is 1466931471223.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3221741396241 + 400 = 1794921^2 + 20^2 .

It is an emirp because it is prime and its reverse (1466931471223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3221741396641 - 2¹ = 3221741396639 is a prime.

Together with 3221741396639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3221741396681) 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 as a sum of consecutive naturals, namely, 1610870698320 + 1610870698321.

It is an arithmetic number, because the mean of its divisors is an integer number (1610870698321).

Almost surely, 2^{3221741396641} is an apocalyptic number.

It is an amenable number.

3221741396641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221741396641 is an equidigital number, since it uses as much as digits as its factorization.

3221741396641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 49.

The spelling of 3221741396641 in words is "three trillion, two hundred twenty-one billion, seven hundred forty-one million, three hundred ninety-six thousand, six hundred forty-one".