121342213 has 2 divisors, whose sum is σ = 121342214. Its totient is φ = 121342212.

The previous prime is 121342187. The next prime is 121342217. The reversal of 121342213 is 312243121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117007489 + 4334724 = 10817^2 + 2082^2 .

It is an emirp because it is prime and its reverse (312243121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121342213 - 2¹³ = 121334021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121342217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60671106 + 60671107.

It is an arithmetic number, because the mean of its divisors is an integer number (60671107).

Almost surely, 2^121342213 is an apocalyptic number.

It is an amenable number.

121342213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121342213 is an equidigital number, since it uses as much as digits as its factorization.

121342213 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 121342213 is about 11015.5441536040. The cubic root of 121342213 is about 495.0745906709.

Adding to 121342213 its reverse (312243121), we get a palindrome (433585334).

The spelling of 121342213 in words is "one hundred twenty-one million, three hundred forty-two thousand, two hundred thirteen".