212221320230213 has 24 divisors (see below), whose sum is σ = 247543622446680. Its totient is φ = 181407627340800.

The previous prime is 212221320230203. The next prime is 212221320230243. The reversal of 212221320230213 is 312032023122212.

It can be written as a sum of positive squares in 4 ways, for example, as 33312959540644 + 178908360689569 = 5771738^2 + 13375663^2 .

It is not a de Polignac number, because 212221320230213 - 2¹⁴ = 212221320213829 is a prime.

It is a super-2 number, since 2×212221320230213² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221320230203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82297433 + ... + 84836961.

It is an arithmetic number, because the mean of its divisors is an integer number (10314317601945).

Almost surely, 2^{212221320230213} is an apocalyptic number.

It is an amenable number.

212221320230213 is a deficient number, since it is larger than the sum of its proper divisors (35322302216467).

212221320230213 is a wasteful number, since it uses less digits than its factorization.

212221320230213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544197 (or 2544190 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 212221320230213 its reverse (312032023122212), we get a palindrome (524253343352425).

The spelling of 212221320230213 in words is "two hundred twelve trillion, two hundred twenty-one billion, three hundred twenty million, two hundred thirty thousand, two hundred thirteen".