221005103 has 8 divisors (see below), whose sum is σ = 241235280. Its totient is φ = 200798080.

The previous prime is 221005097. The next prime is 221005121. The reversal of 221005103 is 301500122.

It is a happy number.

221005103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221005103 - 2¹⁶ = 220939567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221005153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18701 + ... + 28137.

It is an arithmetic number, because the mean of its divisors is an integer number (30154410).

Almost surely, 2^221005103 is an apocalyptic number.

221005103 is a deficient number, since it is larger than the sum of its proper divisors (20230177).

221005103 is a wasteful number, since it uses less digits than its factorization.

221005103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11577.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 221005103 is about 14866.2403787911. The cubic root of 221005103 is about 604.5990130270.

Adding to 221005103 its reverse (301500122), we get a palindrome (522505225).

The spelling of 221005103 in words is "two hundred twenty-one million, five thousand, one hundred three".