222222021212 has 24 divisors (see below), whose sum is σ = 389302173792. Its totient is φ = 110992896000.

The previous prime is 222222021211. The next prime is 222222021223. The reversal of 222222021212 is 212120222222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222021211) 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, 17867348 + ... + 17879780.

It is an arithmetic number, because the mean of its divisors is an integer number (16220923908).

Almost surely, 2^222222021212 is an apocalyptic number.

It is an amenable number.

222222021212 is a deficient number, since it is larger than the sum of its proper divisors (167080152580).

222222021212 is a wasteful number, since it uses less digits than its factorization.

222222021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16829 (or 16827 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222222021212 its reverse (212120222222), we get a palindrome (434342243434).

The spelling of 222222021212 in words is "two hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, two hundred twelve".