221232102 has 128 divisors (see below), whose sum is σ = 573640704. Its totient is φ = 55323648.

The previous prime is 221232083. The next prime is 221232103. The reversal of 221232102 is 201232122.

It is a happy number.

221232102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232103) 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 63 ways as a sum of consecutive naturals, for example, 949378 + ... + 949610.

It is an arithmetic number, because the mean of its divisors is an integer number (4481568).

Almost surely, 2^221232102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221232102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286820352).

221232102 is an abundant number, since it is smaller than the sum of its proper divisors (352408602).

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

221232102 is a wasteful number, since it uses less digits than its factorization.

221232102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221232102 is about 14873.8731337873. The cubic root of 221232102 is about 604.8059409935.

Adding to 221232102 its reverse (201232122), we get a palindrome (422464224).

The spelling of 221232102 in words is "two hundred twenty-one million, two hundred thirty-two thousand, one hundred two".