212013230321 has 2 divisors, whose sum is σ = 212013230322. Its totient is φ = 212013230320.

The previous prime is 212013230309. The next prime is 212013230333. The reversal of 212013230321 is 123032310212.

It is a balanced prime because it is at equal distance from previous prime (212013230309) and next prime (212013230333).

It can be written as a sum of positive squares in only one way, i.e., 194071967296 + 17941263025 = 440536^2 + 133945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212013230321 is a prime.

It is a super-2 number, since 2×212013230321² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212013230293 and 212013230302.

It is not a weakly prime, because it can be changed into another prime (212013230521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006615160 + 106006615161.

It is an arithmetic number, because the mean of its divisors is an integer number (106006615161).

Almost surely, 2^212013230321 is an apocalyptic number.

It is an amenable number.

212013230321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212013230321 is an equidigital number, since it uses as much as digits as its factorization.

212013230321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 212013230321 its reverse (123032310212), we get a palindrome (335045540533).

The spelling of 212013230321 in words is "two hundred twelve billion, thirteen million, two hundred thirty thousand, three hundred twenty-one".