221321024212 has 24 divisors (see below), whose sum is σ = 393230710656. Its totient is φ = 108977913408.

The previous prime is 221321024179. The next prime is 221321024213. The reversal of 221321024212 is 212420123122.

221321024212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321024213) 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 7 ways as a sum of consecutive naturals, for example, 960988 + ... + 1168819.

It is an arithmetic number, because the mean of its divisors is an integer number (16384612944).

Almost surely, 2^221321024212 is an apocalyptic number.

It is an amenable number.

221321024212 is a deficient number, since it is larger than the sum of its proper divisors (171909686444).

221321024212 is a wasteful number, since it uses less digits than its factorization.

221321024212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130207 (or 2130205 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221321024212 its reverse (212420123122), we get a palindrome (433741147334).

The spelling of 221321024212 in words is "two hundred twenty-one billion, three hundred twenty-one million, twenty-four thousand, two hundred twelve".