121204304213 has 2 divisors, whose sum is σ = 121204304214. Its totient is φ = 121204304212.

The previous prime is 121204304203. The next prime is 121204304237. The reversal of 121204304213 is 312403402121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89285623249 + 31918680964 = 298807^2 + 178658^2 .

It is a cyclic number.

It is not a de Polignac number, because 121204304213 - 2¹⁶ = 121204238677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121204304203) 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, 60602152106 + 60602152107.

It is an arithmetic number, because the mean of its divisors is an integer number (60602152107).

Almost surely, 2^121204304213 is an apocalyptic number.

It is an amenable number.

121204304213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121204304213 is an equidigital number, since it uses as much as digits as its factorization.

121204304213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121204304213 its reverse (312403402121), we get a palindrome (433607706334).

The spelling of 121204304213 in words is "one hundred twenty-one billion, two hundred four million, three hundred four thousand, two hundred thirteen".