212103030321 has 96 divisors (see below), whose sum is σ = 389511333120. Its totient is φ = 108222884352.

The previous prime is 212103030289. The next prime is 212103030383. The reversal of 212103030321 is 123030301212.

212103030321 is a `hidden beast` number, since 21 + 21 + 0 + 303 + 0 + 321 = 666.

It is not a de Polignac number, because 212103030321 - 2⁵ = 212103030289 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 212103030294 and 212103030303.

It is not an unprimeable number, because it can be changed into a prime (212103230321) 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 95 ways as a sum of consecutive naturals, for example, 5222190 + ... + 5262648.

It is an arithmetic number, because the mean of its divisors is an integer number (4057409720).

Almost surely, 2^212103030321 is an apocalyptic number.

212103030321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212103030321 is a deficient number, since it is larger than the sum of its proper divisors (177408302799).

212103030321 is a wasteful number, since it uses less digits than its factorization.

212103030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40695 (or 40692 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 212103030321 its reverse (123030301212), we get a palindrome (335133331533).

The spelling of 212103030321 in words is "two hundred twelve billion, one hundred three million, thirty thousand, three hundred twenty-one".