212030321 has 4 divisors (see below), whose sum is σ = 213096000. Its totient is φ = 210964644.

The previous prime is 212030317. The next prime is 212030323. The reversal of 212030321 is 123030212.

It is a happy number.

212030321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212030321 - 2² = 212030317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212030296 and 212030305.

It is not an unprimeable number, because it can be changed into a prime (212030323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532541 + ... + 532938.

It is an arithmetic number, because the mean of its divisors is an integer number (53274000).

Almost surely, 2^212030321 is an apocalyptic number.

It is an amenable number.

212030321 is a deficient number, since it is larger than the sum of its proper divisors (1065679).

212030321 is a wasteful number, since it uses less digits than its factorization.

212030321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065678.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 212030321 is about 14561.2609687486. The cubic root of 212030321 is about 596.3016214626.

Adding to 212030321 its reverse (123030212), we get a palindrome (335060533).

The spelling of 212030321 in words is "two hundred twelve million, thirty thousand, three hundred twenty-one".