222221011212 has 72 divisors (see below), whose sum is σ = 577008104400. Its totient is φ = 72059061888.

The previous prime is 222221011153. The next prime is 222221011253. The reversal of 222221011212 is 212110122222.

It is a happy number.

222221011212 is a `hidden beast` number, since 222 + 221 + 0 + 11 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10364239 + ... + 10385657.

It is an arithmetic number, because the mean of its divisors is an integer number (8014001450).

Almost surely, 2^222221011212 is an apocalyptic number.

It is an amenable number.

222221011212 is an abundant number, since it is smaller than the sum of its proper divisors (354787093188).

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

222221011212 is a wasteful number, since it uses less digits than its factorization.

222221011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29255 (or 29250 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222221011212 its reverse (212110122222), we get a palindrome (434331133434).

The spelling of 222221011212 in words is "two hundred twenty-two billion, two hundred twenty-one million, eleven thousand, two hundred twelve".