2121211233 has 20 divisors (see below), whose sum is σ = 3190007700. Its totient is φ = 1404641952.

The previous prime is 2121211207. The next prime is 2121211237. The reversal of 2121211233 is 3321121212.

It can be written as a sum of positive squares in 2 ways, for example, as 1356301584 + 764909649 = 36828^2 + 27657^2 .

It is not a de Polignac number, because 2121211233 - 2⁵ = 2121211201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121211237) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 75810 + ... + 99947.

It is an arithmetic number, because the mean of its divisors is an integer number (159500385).

Almost surely, 2^2121211233 is an apocalyptic number.

It is an amenable number.

2121211233 is a deficient number, since it is larger than the sum of its proper divisors (1068796467).

2121211233 is a wasteful number, since it uses less digits than its factorization.

2121211233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175918 (or 175909 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2121211233 is about 46056.6090045718. The cubic root of 2121211233 is about 1284.8762633760.

Adding to 2121211233 its reverse (3321121212), we get a palindrome (5442332445).

The spelling of 2121211233 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred thirty-three".