212223234412 has 24 divisors (see below), whose sum is σ = 428822211104. Its totient is φ = 90015155712.

The previous prime is 212223234403. The next prime is 212223234413. The reversal of 212223234412 is 214432322212.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (212223234413) 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, 39066363 + ... + 39071794.

Almost surely, 2^212223234412 is an apocalyptic number.

It is an amenable number.

212223234412 is an abundant number, since it is smaller than the sum of its proper divisors (216598976692).

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

212223234412 is a wasteful number, since it uses less digits than its factorization.

212223234412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78138265 (or 78138263 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

Adding to 212223234412 its reverse (214432322212), we get a palindrome (426655556624).

The spelling of 212223234412 in words is "two hundred twelve billion, two hundred twenty-three million, two hundred thirty-four thousand, four hundred twelve".