212221102320 has 60 divisors (see below), whose sum is σ = 712709204376. Its totient is φ = 56592293760.

The previous prime is 212221102237. The next prime is 212221102391. The reversal of 212221102320 is 23201122212.

212221102320 is a `hidden beast` number, since 21 + 2 + 221 + 102 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212221102293 and 212221102302.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 147375046 + ... + 147376485.

Almost surely, 2^212221102320 is an apocalyptic number.

212221102320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221102320 is an abundant number, since it is smaller than the sum of its proper divisors (500488102056).

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

212221102320 is a wasteful number, since it uses less digits than its factorization.

212221102320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294751550 (or 294751541 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212221102320 its reverse (23201122212), we get a palindrome (235422224532).

The spelling of 212221102320 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred two thousand, three hundred twenty".