1222211211212 has 12 divisors (see below), whose sum is σ = 2139050457096. Its totient is φ = 611053937760.

The previous prime is 1222211211211. The next prime is 1222211211239. The reversal of 1222211211212 is 2121121122221.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1222211211211) 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, 12863714 + ... + 12958377.

It is an arithmetic number, because the mean of its divisors is an integer number (178254204758).

Almost surely, 2^{1222211211212} is an apocalyptic number.

It is an amenable number.

1222211211212 is a deficient number, since it is larger than the sum of its proper divisors (916839245884).

1222211211212 is a wasteful number, since it uses less digits than its factorization.

1222211211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25833928 (or 25833926 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 1222211211212 its reverse (2121121122221), we get a palindrome (3343332333433).

The spelling of 1222211211212 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".