222111021212 has 36 divisors (see below), whose sum is σ = 422776224360. Its totient is φ = 101816563680.

The previous prime is 222111021211. The next prime is 222111021371. The reversal of 222111021212 is 212120111222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222111021211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1447523 + ... + 1593594.

It is an arithmetic number, because the mean of its divisors is an integer number (11743784010).

Almost surely, 2^222111021212 is an apocalyptic number.

It is an amenable number.

222111021212 is a deficient number, since it is larger than the sum of its proper divisors (200665203148).

222111021212 is a wasteful number, since it uses less digits than its factorization.

222111021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041202 (or 3041169 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222111021212 its reverse (212120111222), we get a palindrome (434231132434).

The spelling of 222111021212 in words is "two hundred twenty-two billion, one hundred eleven million, twenty-one thousand, two hundred twelve".