221203132 has 18 divisors (see below), whose sum is σ = 394567208. Its totient is φ = 108509232.

The previous prime is 221203123. The next prime is 221203153. The reversal of 221203132 is 231302122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1393 + ... + 21079.

Almost surely, 2^221203132 is an apocalyptic number.

It is an amenable number.

221203132 is a deficient number, since it is larger than the sum of its proper divisors (173364076).

221203132 is a wasteful number, since it uses less digits than its factorization.

221203132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19797 (or 19742 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221203132 is about 14872.8992466163. The cubic root of 221203132 is about 604.7795403750.

Adding to 221203132 its reverse (231302122), we get a palindrome (452505254).

It can be divided in two parts, 22120 and 3132, that added together give a palindrome (25252).

The spelling of 221203132 in words is "two hundred twenty-one million, two hundred three thousand, one hundred thirty-two".