213221231312 has 40 divisors (see below), whose sum is σ = 418669751040. Its totient is φ = 105179518080.

The previous prime is 213221231287. The next prime is 213221231323. The reversal of 213221231312 is 213132122312.

213221231312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1582262 + ... + 1711722.

It is an arithmetic number, because the mean of its divisors is an integer number (10466743776).

Almost surely, 2^213221231312 is an apocalyptic number.

It is an amenable number.

213221231312 is a deficient number, since it is larger than the sum of its proper divisors (205448519728).

213221231312 is a wasteful number, since it uses less digits than its factorization.

213221231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130851 (or 130845 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 213221231312 its reverse (213132122312), we get a palindrome (426353353624).

The spelling of 213221231312 in words is "two hundred thirteen billion, two hundred twenty-one million, two hundred thirty-one thousand, three hundred twelve".