123210213212 has 24 divisors (see below), whose sum is σ = 219818866176. Its totient is φ = 60406227648.

The previous prime is 123210213179. The next prime is 123210213299. The reversal of 123210213212 is 212312012321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177818 + ... + 527294.

It is an arithmetic number, because the mean of its divisors is an integer number (9159119424).

Almost surely, 2^123210213212 is an apocalyptic number.

It is an amenable number.

123210213212 is a deficient number, since it is larger than the sum of its proper divisors (96608652964).

123210213212 is a wasteful number, since it uses less digits than its factorization.

123210213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351197 (or 351195 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123210213212 its reverse (212312012321), we get a palindrome (335522225533).

The spelling of 123210213212 in words is "one hundred twenty-three billion, two hundred ten million, two hundred thirteen thousand, two hundred twelve".