221200093 has 2 divisors, whose sum is σ = 221200094. Its totient is φ = 221200092.

The previous prime is 221200069. The next prime is 221200121. The reversal of 221200093 is 390002122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209728324 + 11471769 = 14482^2 + 3387^2 .

It is a cyclic number.

It is not a de Polignac number, because 221200093 - 2¹⁷ = 221069021 is a prime.

It is a super-2 number, since 2×221200093² = 97858962286417298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221200093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221200193) 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, 110600046 + 110600047.

It is an arithmetic number, because the mean of its divisors is an integer number (110600047).

Almost surely, 2^221200093 is an apocalyptic number.

It is an amenable number.

221200093 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200093 is an equidigital number, since it uses as much as digits as its factorization.

221200093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 221200093 is about 14872.7970805763. The cubic root of 221200093 is about 604.7767707737.

The spelling of 221200093 in words is "two hundred twenty-one million, two hundred thousand, ninety-three".