2223221212 has 12 divisors (see below), whose sum is σ = 3925068336. Its totient is φ = 1101773120.

The previous prime is 2223221207. The next prime is 2223221219. The reversal of 2223221212 is 2121223222.

It is a self number, because there is not a number n which added to its sum of digits gives 2223221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223221219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2458864 + ... + 2459767.

It is an arithmetic number, because the mean of its divisors is an integer number (327089028).

Almost surely, 2^2223221212 is an apocalyptic number.

It is an amenable number.

2223221212 is a deficient number, since it is larger than the sum of its proper divisors (1701847124).

2223221212 is a wasteful number, since it uses less digits than its factorization.

2223221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4918748 (or 4918746 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 2223221212 is about 47151.0467752308. The cubic root of 2223221212 is about 1305.1513967325.

Adding to 2223221212 its reverse (2121223222), we get a palindrome (4344444434).

The spelling of 2223221212 in words is "two billion, two hundred twenty-three million, two hundred twenty-one thousand, two hundred twelve".