2211221212 has 12 divisors (see below), whose sum is σ = 4097262960. Its totient is φ = 1040574656.

The previous prime is 2211221209. The next prime is 2211221249. The reversal of 2211221212 is 2121221122.

It is a happy number.

2211221212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16258912 + ... + 16259047.

It is an arithmetic number, because the mean of its divisors is an integer number (341438580).

Almost surely, 2^2211221212 is an apocalyptic number.

It is an amenable number.

2211221212 is a deficient number, since it is larger than the sum of its proper divisors (1886041748).

2211221212 is a wasteful number, since it uses less digits than its factorization.

2211221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32517980 (or 32517978 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 2211221212 is about 47023.6239777412. The cubic root of 2211221212 is about 1302.7989422426.

Adding to 2211221212 its reverse (2121221122), we get a palindrome (4332442334).

The spelling of 2211221212 in words is "two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twelve".