3402205421521 has 2 divisors, whose sum is σ = 3402205421522. Its totient is φ = 3402205421520.

The previous prime is 3402205421501. The next prime is 3402205421533. The reversal of 3402205421521 is 1251245022043.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3398215730625 + 3989690896 = 1843425^2 + 63164^2 .

It is a cyclic number.

It is not a de Polignac number, because 3402205421521 - 2³⁷ = 3264766468049 is a prime.

It is not a weakly prime, because it can be changed into another prime (3402205421501) 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, 1701102710760 + 1701102710761.

It is an arithmetic number, because the mean of its divisors is an integer number (1701102710761).

Almost surely, 2^{3402205421521} is an apocalyptic number.

It is an amenable number.

3402205421521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3402205421521 is an equidigital number, since it uses as much as digits as its factorization.

3402205421521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 3402205421521 in words is "three trillion, four hundred two billion, two hundred five million, four hundred twenty-one thousand, five hundred twenty-one".