213122204212 has 18 divisors (see below), whose sum is σ = 377201604038. Its totient is φ = 105363770688.

The previous prime is 213122204179. The next prime is 213122204219. The reversal of 213122204212 is 212402221312.

213122204212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 7374687376 + 205747516836 = 85876^2 + 453594^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213122204219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3331563 + ... + 3394930.

Almost surely, 2^213122204212 is an apocalyptic number.

It is an amenable number.

213122204212 is a deficient number, since it is larger than the sum of its proper divisors (164079399826).

213122204212 is an equidigital number, since it uses as much as digits as its factorization.

213122204212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6726675 (or 6726584 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 213122204212 its reverse (212402221312), we get a palindrome (425524425524).

The spelling of 213122204212 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred four thousand, two hundred twelve".