2123221213 has 2 divisors, whose sum is σ = 2123221214. Its totient is φ = 2123221212.

The previous prime is 2123221183. The next prime is 2123221229. The reversal of 2123221213 is 3121223212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1712469924 + 410751289 = 41382^2 + 20267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123221213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123221013) 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, 1061610606 + 1061610607.

It is an arithmetic number, because the mean of its divisors is an integer number (1061610607).

Almost surely, 2^2123221213 is an apocalyptic number.

It is an amenable number.

2123221213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123221213 is an equidigital number, since it uses as much as digits as its factorization.

2123221213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 2123221213 is about 46078.4245932953. The cubic root of 2123221213 is about 1285.2819687364.

Adding to 2123221213 its reverse (3121223212), we get a palindrome (5244444425).

The spelling of 2123221213 in words is "two billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred thirteen".