121336447 has 2 divisors, whose sum is σ = 121336448. Its totient is φ = 121336446.

The previous prime is 121336441. The next prime is 121336483. The reversal of 121336447 is 744633121.

It is a weak prime.

It is an emirp because it is prime and its reverse (744633121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121336447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121336441) 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, 60668223 + 60668224.

It is an arithmetic number, because the mean of its divisors is an integer number (60668224).

Almost surely, 2^121336447 is an apocalyptic number.

121336447 is a deficient number, since it is larger than the sum of its proper divisors (1).

121336447 is an equidigital number, since it uses as much as digits as its factorization.

121336447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 121336447 is about 11015.2824294250. The cubic root of 121336447 is about 495.0667488126.

Adding to 121336447 its reverse (744633121), we get a palindrome (865969568).

The spelling of 121336447 in words is "one hundred twenty-one million, three hundred thirty-six thousand, four hundred forty-seven".