121313999 has 2 divisors, whose sum is σ = 121314000. Its totient is φ = 121313998.

The previous prime is 121313987. The next prime is 121314049. The reversal of 121313999 is 999313121.

It is a weak prime.

It is an emirp because it is prime and its reverse (999313121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121313999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121313099) 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, 60656999 + 60657000.

It is an arithmetic number, because the mean of its divisors is an integer number (60657000).

Almost surely, 2^121313999 is an apocalyptic number.

121313999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121313999 is an equidigital number, since it uses as much as digits as its factorization.

121313999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 38.

The square root of 121313999 is about 11014.2634342928. The cubic root of 121313999 is about 495.0362167835.

The spelling of 121313999 in words is "one hundred twenty-one million, three hundred thirteen thousand, nine hundred ninety-nine".