222121412212 has 24 divisors (see below), whose sum is σ = 444252803456. Its totient is φ = 95192752608.

The previous prime is 222121412209. The next prime is 222121412213. The reversal of 222121412212 is 212214121222.

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 (222121412213) 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, 2383078 + ... + 2474530.

Almost surely, 2^222121412212 is an apocalyptic number.

It is an amenable number.

222121412212 is an abundant number, since it is smaller than the sum of its proper divisors (222131391244).

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

222121412212 is a wasteful number, since it uses less digits than its factorization.

222121412212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178207 (or 178205 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

Adding to 222121412212 its reverse (212214121222), we get a palindrome (434335533434).

The spelling of 222121412212 in words is "two hundred twenty-two billion, one hundred twenty-one million, four hundred twelve thousand, two hundred twelve".