221230212 has 96 divisors (see below), whose sum is σ = 614718720. Its totient is φ = 60587520.

The previous prime is 221230211. The next prime is 221230267. The reversal of 221230212 is 212032122.

It is a happy number.

221230212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221230191 and 221230200.

It is not an unprimeable number, because it can be changed into a prime (221230211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479662 + ... + 480122.

It is an arithmetic number, because the mean of its divisors is an integer number (6403320).

Almost surely, 2^221230212 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 221230212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307359360).

221230212 is an abundant number, since it is smaller than the sum of its proper divisors (393488508).

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

221230212 is a wasteful number, since it uses less digits than its factorization.

221230212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 699 counting only the distinct ones).

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

The square root of 221230212 is about 14873.8095994268. The cubic root of 221230212 is about 604.8042186900.

Adding to 221230212 its reverse (212032122), we get a palindrome (433262334).

The spelling of 221230212 in words is "two hundred twenty-one million, two hundred thirty thousand, two hundred twelve".