211221223230 has 32 divisors (see below), whose sum is σ = 513347788800. Its totient is φ = 55612675872.

The previous prime is 211221223193. The next prime is 211221223237. The reversal of 211221223230 is 32322122112.

211221223230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211221223230² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221223197 and 211221223206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221223237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44559070 + ... + 44563809.

It is an arithmetic number, because the mean of its divisors is an integer number (16042118400).

Almost surely, 2^211221223230 is an apocalyptic number.

211221223230 is an abundant number, since it is smaller than the sum of its proper divisors (302126565570).

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

211221223230 is a wasteful number, since it uses less digits than its factorization.

211221223230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89122968.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 211221223230 its reverse (32322122112), we get a palindrome (243543345342).

The spelling of 211221223230 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty".