4221834173209 has 2 divisors, whose sum is σ = 4221834173210. Its totient is φ = 4221834173208.

The previous prime is 4221834173147. The next prime is 4221834173231. The reversal of 4221834173209 is 9023714381224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3939145233984 + 282688939225 = 1984728^2 + 531685^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221834173209 - 2²¹ = 4221832076057 is a prime.

It is a super-2 number, since 2×4221834173209² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4221834173299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110917086604 + 2110917086605.

It is an arithmetic number, because the mean of its divisors is an integer number (2110917086605).

Almost surely, 2^{4221834173209} is an apocalyptic number.

It is an amenable number.

4221834173209 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221834173209 is an equidigital number, since it uses as much as digits as its factorization.

4221834173209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 4221834173209 in words is "four trillion, two hundred twenty-one billion, eight hundred thirty-four million, one hundred seventy-three thousand, two hundred nine".