2122321 has 2 divisors, whose sum is σ = 2122322. Its totient is φ = 2122320.

The previous prime is 2122303. The next prime is 2122327. The reversal of 2122321 is 1232212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347921 + 774400 = 1161^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122321 - 2⁷ = 2122193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2122327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061160 + 1061161.

It is an arithmetic number, because the mean of its divisors is an integer number (1061161).

2^2122321 is an apocalyptic number.

It is an amenable number.

2122321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122321 is an equidigital number, since it uses as much as digits as its factorization.

2122321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 13.

The square root of 2122321 is about 1456.8187944971. The cubic root of 2122321 is about 128.5100296491.

Adding to 2122321 its reverse (1232212), we get a palindrome (3354533).

The spelling of 2122321 in words is "two million, one hundred twenty-two thousand, three hundred twenty-one".