242121413 has 2 divisors, whose sum is σ = 242121414. Its totient is φ = 242121412.

The previous prime is 242121401. The next prime is 242121421. The reversal of 242121413 is 314121242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122722084 + 119399329 = 11078^2 + 10927^2 .

It is a cyclic number.

It is not a de Polignac number, because 242121413 - 2¹⁴ = 242105029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242121613) 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, 121060706 + 121060707.

It is an arithmetic number, because the mean of its divisors is an integer number (121060707).

Almost surely, 2^242121413 is an apocalyptic number.

It is an amenable number.

242121413 is a deficient number, since it is larger than the sum of its proper divisors (1).

242121413 is an equidigital number, since it uses as much as digits as its factorization.

242121413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 242121413 is about 15560.2510583859. The cubic root of 242121413 is about 623.2721668432.

Adding to 242121413 its reverse (314121242), we get a palindrome (556242655).

The spelling of 242121413 in words is "two hundred forty-two million, one hundred twenty-one thousand, four hundred thirteen".