2123212211 has 2 divisors, whose sum is σ = 2123212212. Its totient is φ = 2123212210.

The previous prime is 2123212207. The next prime is 2123212253. The reversal of 2123212211 is 1122123212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123212211 - 2² = 2123212207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2123212211.

It is not a weakly prime, because it can be changed into another prime (2123212261) 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 as a sum of consecutive naturals, namely, 1061606105 + 1061606106.

It is an arithmetic number, because the mean of its divisors is an integer number (1061606106).

Almost surely, 2^2123212211 is an apocalyptic number.

2123212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123212211 is an equidigital number, since it uses as much as digits as its factorization.

2123212211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 2123212211 is about 46078.3269119008. The cubic root of 2123212211 is about 1285.2801522944.

Adding to 2123212211 its reverse (1122123212), we get a palindrome (3245335423).

The spelling of 2123212211 in words is "two billion, one hundred twenty-three million, two hundred twelve thousand, two hundred eleven".