3421261265209 has 2 divisors, whose sum is σ = 3421261265210. Its totient is φ = 3421261265208.

The previous prime is 3421261265173. The next prime is 3421261265249. The reversal of 3421261265209 is 9025621621243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2776315747984 + 644945517225 = 1666228^2 + 803085^2 .

It is a cyclic number.

It is not a de Polignac number, because 3421261265209 - 2⁹ = 3421261264697 is a prime.

It is a super-3 number, since 3×3421261265209³ (a number of 39 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (3421261265249) 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, 1710630632604 + 1710630632605.

It is an arithmetic number, because the mean of its divisors is an integer number (1710630632605).

Almost surely, 2^{3421261265209} is an apocalyptic number.

It is an amenable number.

3421261265209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3421261265209 is an equidigital number, since it uses as much as digits as its factorization.

3421261265209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 3421261265209 in words is "three trillion, four hundred twenty-one billion, two hundred sixty-one million, two hundred sixty-five thousand, two hundred nine".