221102232 has 128 divisors (see below), whose sum is σ = 620524800. Its totient is φ = 65207808.

The previous prime is 221102227. The next prime is 221102251. The reversal of 221102232 is 232201122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1235119 + ... + 1235297.

It is an arithmetic number, because the mean of its divisors is an integer number (4847850).

Almost surely, 2^221102232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221102232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310262400).

221102232 is an abundant number, since it is smaller than the sum of its proper divisors (399422568).

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

221102232 is a wasteful number, since it uses less digits than its factorization.

221102232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 341 counting only the distinct ones).

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

The square root of 221102232 is about 14869.5067840194. The cubic root of 221102232 is about 604.6875713091.

Adding to 221102232 its reverse (232201122), we get a palindrome (453303354).

It can be divided in two parts, 22110 and 2232, that added together give a palindrome (24342).

The spelling of 221102232 in words is "two hundred twenty-one million, one hundred two thousand, two hundred thirty-two".