2121211212 has 24 divisors (see below), whose sum is σ = 4987278912. Its totient is φ = 701672400.

The previous prime is 2121211207. The next prime is 2121211237. The reversal of 2121211212 is 2121121212.

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

It is a junction number, because it is equal to n+sod(n) for n = 2121211191 and 2121211200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673114 + ... + 676257.

It is an arithmetic number, because the mean of its divisors is an integer number (207803288).

Almost surely, 2^2121211212 is an apocalyptic number.

It is an amenable number.

2121211212 is an abundant number, since it is smaller than the sum of its proper divisors (2866067700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121211212 is a wasteful number, since it uses less digits than its factorization.

2121211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349509 (or 1349507 counting only the distinct ones).

The product of its digits is 32, while the sum is 15.

The square root of 2121211212 is about 46056.6087765914. The cubic root of 2121211212 is about 1284.8762591359.

Adding to 2121211212 its reverse (2121121212), we get a palindrome (4242332424).

Subtracting from 2121211212 its reverse (2121121212), we obtain a square (90000 = 300²).

The spelling of 2121211212 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".