2211111212 has 12 divisors (see below), whose sum is σ = 3870146280. Its totient is φ = 1105355136.

The previous prime is 2211111209. The next prime is 2211111289. The reversal of 2211111212 is 2121111122.

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

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, 23762 + ... + 70617.

It is an arithmetic number, because the mean of its divisors is an integer number (322512190).

Almost surely, 2^2211111212 is an apocalyptic number.

It is an amenable number.

2211111212 is a deficient number, since it is larger than the sum of its proper divisors (1659035068).

2211111212 is a wasteful number, since it uses less digits than its factorization.

2211111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100240 (or 100238 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 2211111212 is about 47022.4543383265. The cubic root of 2211111212 is about 1302.7773387565. Note that the first 3 decimals are identical.

Adding to 2211111212 its reverse (2121111122), we get a palindrome (4332222334).

The spelling of 2211111212 in words is "two billion, two hundred eleven million, one hundred eleven thousand, two hundred twelve".