2112221212 has 24 divisors (see below), whose sum is σ = 3719471616. Its totient is φ = 1049532528.

The previous prime is 2112221207. The next prime is 2112221213. The reversal of 2112221212 is 2121222112.

It is a happy number.

It is a super-2 number, since 2×2112221212² = 8922956896845497888, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112221213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607503 + ... + 610969.

It is an arithmetic number, because the mean of its divisors is an integer number (154977984).

Almost surely, 2^2112221212 is an apocalyptic number.

It is an amenable number.

2112221212 is a deficient number, since it is larger than the sum of its proper divisors (1607250404).

2112221212 is a wasteful number, since it uses less digits than its factorization.

2112221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377 (or 4375 counting only the distinct ones).

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

The square root of 2112221212 is about 45958.9078634382. The cubic root of 2112221212 is about 1283.0585249474.

Adding to 2112221212 its reverse (2121222112), we get a palindrome (4233443324).

The spelling of 2112221212 in words is "two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twelve".