213213123212 has 12 divisors (see below), whose sum is σ = 373127755056. Its totient is φ = 106605193200.

The previous prime is 213213123187. The next prime is 213213123217. The reversal of 213213123212 is 212321312312.

It is not an unprimeable number, because it can be changed into a prime (213213123217) 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 3 ways as a sum of consecutive naturals, for example, 61337 + ... + 655887.

It is an arithmetic number, because the mean of its divisors is an integer number (31093979588).

Almost surely, 2^213213123212 is an apocalyptic number.

It is an amenable number.

213213123212 is a deficient number, since it is larger than the sum of its proper divisors (159914631844).

213213123212 is a wasteful number, since it uses less digits than its factorization.

213213123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684208 (or 684206 counting only the distinct ones).

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

Adding to 213213123212 its reverse (212321312312), we get a palindrome (425534435524).

The spelling of 213213123212 in words is "two hundred thirteen billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred twelve".