221336474473 has 2 divisors, whose sum is σ = 221336474474. Its totient is φ = 221336474472.

The previous prime is 221336474399. The next prime is 221336474507. The reversal of 221336474473 is 374474633122.

221336474473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219498809049 + 1837665424 = 468507^2 + 42868^2 .

It is a cyclic number.

It is not a de Polignac number, because 221336474473 - 2¹⁷ = 221336343401 is a prime.

It is not a weakly prime, because it can be changed into another prime (221336475473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110668237236 + 110668237237.

It is an arithmetic number, because the mean of its divisors is an integer number (110668237237).

Almost surely, 2^221336474473 is an apocalyptic number.

It is an amenable number.

221336474473 is a deficient number, since it is larger than the sum of its proper divisors (1).

221336474473 is an equidigital number, since it uses as much as digits as its factorization.

221336474473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 46.

The spelling of 221336474473 in words is "two hundred twenty-one billion, three hundred thirty-six million, four hundred seventy-four thousand, four hundred seventy-three".