221103132 has 12 divisors (see below), whose sum is σ = 515907336. Its totient is φ = 73701040.

The previous prime is 221103131. The next prime is 221103137. The reversal of 221103132 is 231301122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221103131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9212619 + ... + 9212642.

It is an arithmetic number, because the mean of its divisors is an integer number (42992278).

Almost surely, 2^221103132 is an apocalyptic number.

It is an amenable number.

221103132 is an abundant number, since it is smaller than the sum of its proper divisors (294804204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221103132 is a wasteful number, since it uses less digits than its factorization.

221103132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425268 (or 18425266 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221103132 is about 14869.5370472655. The cubic root of 221103132 is about 604.6883917713.

Adding to 221103132 its reverse (231301122), we get a palindrome (452404254).

The spelling of 221103132 in words is "two hundred twenty-one million, one hundred three thousand, one hundred thirty-two".