212120221304 has 64 divisors (see below), whose sum is σ = 413242214400. Its totient is φ = 101969078400.

The previous prime is 212120221303. The next prime is 212120221307. The reversal of 212120221304 is 403122021212.

212120221304 is digitally balanced in base 3, 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 (212120221303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27881069 + ... + 27888675.

It is an arithmetic number, because the mean of its divisors is an integer number (6456909600).

Almost surely, 2^212120221304 is an apocalyptic number.

It is an amenable number.

212120221304 is a deficient number, since it is larger than the sum of its proper divisors (201121993096).

212120221304 is a wasteful number, since it uses less digits than its factorization.

212120221304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364 (or 8360 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212120221304 its reverse (403122021212), we get a palindrome (615242242516).

The spelling of 212120221304 in words is "two hundred twelve billion, one hundred twenty million, two hundred twenty-one thousand, three hundred four".