212330300021 has 6 divisors (see below), whose sum is σ = 246996471510. Its totient is φ = 181997399976.

The previous prime is 212330299981. The next prime is 212330300023. The reversal of 212330300021 is 120003033212.

It can be written as a sum of positive squares in only one way, i.e., 175548430225 + 36781869796 = 418985^2 + 191786^2 .

It is not a de Polignac number, because 212330300021 - 2³⁴ = 195150430837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212330300023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2166635666 + ... + 2166635763.

It is an arithmetic number, because the mean of its divisors is an integer number (41166078585).

Almost surely, 2^212330300021 is an apocalyptic number.

It is an amenable number.

212330300021 is a deficient number, since it is larger than the sum of its proper divisors (34666171489).

212330300021 is an equidigital number, since it uses as much as digits as its factorization.

212330300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333271443 (or 4333271436 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 212330300021 its reverse (120003033212), we get a palindrome (332333333233).

The spelling of 212330300021 in words is "two hundred twelve billion, three hundred thirty million, three hundred thousand, twenty-one".