212130013220 has 24 divisors (see below), whose sum is σ = 446447823864. Its totient is φ = 84666329856.

The previous prime is 212130013171. The next prime is 212130013223. The reversal of 212130013220 is 22310031212.

212130013220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 117310360036 + 94819653184 = 342506^2 + 307928^2 .

It is not an unprimeable number, because it can be changed into a prime (212130013223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11595347 + ... + 11613626.

It is an arithmetic number, because the mean of its divisors is an integer number (18601992661).

Almost surely, 2^212130013220 is an apocalyptic number.

212130013220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212130013220 is an abundant number, since it is smaller than the sum of its proper divisors (234317810644).

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

212130013220 is a wasteful number, since it uses less digits than its factorization.

212130013220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23209439 (or 23209437 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212130013220 its reverse (22310031212), we get a palindrome (234440044432).

The spelling of 212130013220 in words is "two hundred twelve billion, one hundred thirty million, thirteen thousand, two hundred twenty".