3420304451521 has 2 divisors, whose sum is σ = 3420304451522. Its totient is φ = 3420304451520.

The previous prime is 3420304451477. The next prime is 3420304451587. The reversal of 3420304451521 is 1251544030243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3275234877121 + 145069574400 = 1809761^2 + 380880^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420304451521 - 2⁹ = 3420304451009 is a prime.

It is not a weakly prime, because it can be changed into another prime (3420394451521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710152225760 + 1710152225761.

It is an arithmetic number, because the mean of its divisors is an integer number (1710152225761).

Almost surely, 2^{3420304451521} is an apocalyptic number.

It is an amenable number.

3420304451521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420304451521 is an equidigital number, since it uses as much as digits as its factorization.

3420304451521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 3420304451521 its reverse (1251544030243), we get a palindrome (4671848481764).

The spelling of 3420304451521 in words is "three trillion, four hundred twenty billion, three hundred four million, four hundred fifty-one thousand, five hundred twenty-one".