221230220 has 12 divisors (see below), whose sum is σ = 464583504. Its totient is φ = 88492080.

The previous prime is 221230211. The next prime is 221230267. The reversal of 221230220 is 22032122.

It is a junction number, because it is equal to n+sod(n) for n = 221230195 and 221230204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5530736 + ... + 5530775.

It is an arithmetic number, because the mean of its divisors is an integer number (38715292).

Almost surely, 2^221230220 is an apocalyptic number.

221230220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221230220 is an abundant number, since it is smaller than the sum of its proper divisors (243353284).

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

221230220 is a wasteful number, since it uses less digits than its factorization.

221230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11061520 (or 11061518 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 221230220 is about 14873.8098683559. The cubic root of 221230220 is about 604.8042259801.

Adding to 221230220 its reverse (22032122), we get a palindrome (243262342).

The spelling of 221230220 in words is "two hundred twenty-one million, two hundred thirty thousand, two hundred twenty".