221050105 has 4 divisors (see below), whose sum is σ = 265260132. Its totient is φ = 176840080.

The previous prime is 221050097. The next prime is 221050111. The reversal of 221050105 is 501050122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46730896 + 174319209 = 6836^2 + 13203^2 .

It is not a de Polignac number, because 221050105 - 2³ = 221050097 is a prime.

It is a super-2 number, since 2×221050105² = 97726297841022050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22105006 + ... + 22105015.

It is an arithmetic number, because the mean of its divisors is an integer number (66315033).

Almost surely, 2^221050105 is an apocalyptic number.

It is an amenable number.

221050105 is a deficient number, since it is larger than the sum of its proper divisors (44210027).

221050105 is an equidigital number, since it uses as much as digits as its factorization.

221050105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44210026.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 221050105 is about 14867.7538653288. The cubic root of 221050105 is about 604.6400472503.

The spelling of 221050105 in words is "two hundred twenty-one million, fifty thousand, one hundred five".