221011230 has 128 divisors (see below), whose sum is σ = 616896000. Its totient is φ = 50112000.

The previous prime is 221011201. The next prime is 221011243. The reversal of 221011230 is 32110122.

It is a super-2 number, since 2×221011230² = 97691927572225800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 633096 + ... + 633444.

It is an arithmetic number, because the mean of its divisors is an integer number (4819500).

Almost surely, 2^221011230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221011230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308448000).

221011230 is an abundant number, since it is smaller than the sum of its proper divisors (395884770).

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

221011230 is a wasteful number, since it uses less digits than its factorization.

221011230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221011230 is about 14866.4464482942. The cubic root of 221011230 is about 604.6046001437.

Adding to 221011230 its reverse (32110122), we get a palindrome (253121352).

The spelling of 221011230 in words is "two hundred twenty-one million, eleven thousand, two hundred thirty".