2121122212 has 24 divisors (see below), whose sum is σ = 4055728320. Its totient is φ = 962643360.

The previous prime is 2121122197. The next prime is 2121122219. The reversal of 2121122212 is 2122211212.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (2121122219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8787 + ... + 65722.

It is an arithmetic number, because the mean of its divisors is an integer number (168988680).

Almost surely, 2^2121122212 is an apocalyptic number.

2121122212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2121122212 is a deficient number, since it is larger than the sum of its proper divisors (1934606108).

2121122212 is a wasteful number, since it uses less digits than its factorization.

2121122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75171 (or 75169 counting only the distinct ones).

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

The square root of 2121122212 is about 46055.6425641853. The cubic root of 2121122212 is about 1284.8582889646.

Adding to 2121122212 its reverse (2122211212), we get a palindrome (4243333424).

The spelling of 2121122212 in words is "two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".