121322213 has 2 divisors, whose sum is σ = 121322214. Its totient is φ = 121322212.

The previous prime is 121322209. The next prime is 121322237. The reversal of 121322213 is 312223121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113912929 + 7409284 = 10673^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 121322213 - 2² = 121322209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121322191 and 121322200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121322273) 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 as a sum of consecutive naturals, namely, 60661106 + 60661107.

It is an arithmetic number, because the mean of its divisors is an integer number (60661107).

Almost surely, 2^121322213 is an apocalyptic number.

It is an amenable number.

121322213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121322213 is an equidigital number, since it uses as much as digits as its factorization.

121322213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 17.

The square root of 121322213 is about 11014.6363081129. The cubic root of 121322213 is about 495.0473892664.

Adding to 121322213 its reverse (312223121), we get a palindrome (433545334).

The spelling of 121322213 in words is "one hundred twenty-one million, three hundred twenty-two thousand, two hundred thirteen".