212231341221 has 16 divisors (see below), whose sum is σ = 287092113408. Its totient is φ = 139443822000.

The previous prime is 212231341199. The next prime is 212231341249. The reversal of 212231341221 is 122143132212.

212231341221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212231341221 - 2¹⁰ = 212231340197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212231341191 and 212231341200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212231341261) 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 15 ways as a sum of consecutive naturals, for example, 1786965 + ... + 1902026.

It is an arithmetic number, because the mean of its divisors is an integer number (17943257088).

Almost surely, 2^212231341221 is an apocalyptic number.

It is an amenable number.

212231341221 is a deficient number, since it is larger than the sum of its proper divisors (74860772187).

212231341221 is a wasteful number, since it uses less digits than its factorization.

212231341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689272.

The product of its digits is 1152, while the sum is 24.

Adding to 212231341221 its reverse (122143132212), we get a palindrome (334374473433).

The spelling of 212231341221 in words is "two hundred twelve billion, two hundred thirty-one million, three hundred forty-one thousand, two hundred twenty-one".