2121218212 has 12 divisors (see below), whose sum is σ = 3730787200. Its totient is φ = 1055279016.

The previous prime is 2121218179. The next prime is 2121218219. The reversal of 2121218212 is 2128121212.

It is not an unprimeable number, because it can be changed into a prime (2121218219) 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, 1331628 + ... + 1333219.

Almost surely, 2^2121218212 is an apocalyptic number.

It is an amenable number.

2121218212 is a deficient number, since it is larger than the sum of its proper divisors (1609568988).

2121218212 is a wasteful number, since it uses less digits than its factorization.

2121218212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665050 (or 2665048 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 2121218212 is about 46056.6847699658. The cubic root of 2121218212 is about 1284.8776724988.

Adding to 2121218212 its reverse (2128121212), we get a palindrome (4249339424).

The spelling of 2121218212 in words is "two billion, one hundred twenty-one million, two hundred eighteen thousand, two hundred twelve".