212211011321 has 4 divisors (see below), whose sum is σ = 212618326644. Its totient is φ = 211803696000.

The previous prime is 212211011281. The next prime is 212211011333. The reversal of 212211011321 is 123110112212.

It is a happy number.

212211011321 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.

It can be written as a sum of positive squares in 2 ways, for example, as 71877610000 + 140333401321 = 268100^2 + 374611^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211011321 - 2¹⁴ = 212210994937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212211011321.

It is not an unprimeable number, because it can be changed into a prime (212211011821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203656880 + ... + 203657921.

It is an arithmetic number, because the mean of its divisors is an integer number (53154581661).

Almost surely, 2^212211011321 is an apocalyptic number.

It is an amenable number.

212211011321 is a deficient number, since it is larger than the sum of its proper divisors (407315323).

212211011321 is an equidigital number, since it uses as much as digits as its factorization.

212211011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407315322.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 212211011321 its reverse (123110112212), we get a palindrome (335321123533).

The spelling of 212211011321 in words is "two hundred twelve billion, two hundred eleven million, eleven thousand, three hundred twenty-one".