121204423 has 2 divisors, whose sum is σ = 121204424. Its totient is φ = 121204422.

The previous prime is 121204417. The next prime is 121204453. The reversal of 121204423 is 324402121.

It is a weak prime.

It is an emirp because it is prime and its reverse (324402121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121204423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121204423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121204453) 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, 60602211 + 60602212.

It is an arithmetic number, because the mean of its divisors is an integer number (60602212).

Almost surely, 2^121204423 is an apocalyptic number.

121204423 is a deficient number, since it is larger than the sum of its proper divisors (1).

121204423 is an equidigital number, since it uses as much as digits as its factorization.

121204423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 121204423 is about 11009.2880332926. The cubic root of 121204423 is about 494.8871259146.

Adding to 121204423 its reverse (324402121), we get a palindrome (445606544).

The spelling of 121204423 in words is "one hundred twenty-one million, two hundred four thousand, four hundred twenty-three".