212321123412 has 24 divisors (see below), whose sum is σ = 495540950016. Its totient is φ = 70755851328.

The previous prime is 212321123381. The next prime is 212321123419. The reversal of 212321123412 is 214321123212.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212321123419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2182473 + ... + 2277680.

It is an arithmetic number, because the mean of its divisors is an integer number (20647539584).

Almost surely, 2^212321123412 is an apocalyptic number.

It is an amenable number.

212321123412 is an abundant number, since it is smaller than the sum of its proper divisors (283219826604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212321123412 is a wasteful number, since it uses less digits than its factorization.

212321123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464127 (or 4464125 counting only the distinct ones).

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

Adding to 212321123412 its reverse (214321123212), we get a palindrome (426642246624).

The spelling of 212321123412 in words is "two hundred twelve billion, three hundred twenty-one million, one hundred twenty-three thousand, four hundred twelve".