84334475221 has 2 divisors, whose sum is σ = 84334475222. Its totient is φ = 84334475220.

The previous prime is 84334475149. The next prime is 84334475227. The reversal of 84334475221 is 12257443348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70230300100 + 14104175121 = 265010^2 + 118761^2 .

It is a cyclic number.

It is not a de Polignac number, because 84334475221 - 2¹¹ = 84334473173 is a prime.

It is a super-2 number, since 2×84334475221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84334475227) 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, 42167237610 + 42167237611.

It is an arithmetic number, because the mean of its divisors is an integer number (42167237611).

Almost surely, 2^84334475221 is an apocalyptic number.

It is an amenable number.

84334475221 is a deficient number, since it is larger than the sum of its proper divisors (1).

84334475221 is an equidigital number, since it uses as much as digits as its factorization.

84334475221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 43.

The spelling of 84334475221 in words is "eighty-four billion, three hundred thirty-four million, four hundred seventy-five thousand, two hundred twenty-one".