221200103 has 4 divisors (see below), whose sum is σ = 221290368. Its totient is φ = 221109840.

The previous prime is 221200093. The next prime is 221200121. The reversal of 221200103 is 301002122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301002122 = 2 ⋅150501061.

It is a cyclic number.

It is not a de Polignac number, because 221200103 - 2¹⁶ = 221134567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200123) 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 in 3 ways as a sum of consecutive naturals, for example, 41351 + ... + 46392.

It is an arithmetic number, because the mean of its divisors is an integer number (55322592).

Almost surely, 2^221200103 is an apocalyptic number.

221200103 is a deficient number, since it is larger than the sum of its proper divisors (90265).

221200103 is an equidigital number, since it uses as much as digits as its factorization.

221200103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90264.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 221200103 is about 14872.7974167606. The cubic root of 221200103 is about 604.7767798873.

Adding to 221200103 its reverse (301002122), we get a palindrome (522202225).

The spelling of 221200103 in words is "two hundred twenty-one million, two hundred thousand, one hundred three".