121917311 has 2 divisors, whose sum is σ = 121917312. Its totient is φ = 121917310.

The previous prime is 121917307. The next prime is 121917329. The reversal of 121917311 is 113719121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121917311 - 2² = 121917307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121917371) 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, 60958655 + 60958656.

It is an arithmetic number, because the mean of its divisors is an integer number (60958656).

Almost surely, 2^121917311 is an apocalyptic number.

121917311 is a deficient number, since it is larger than the sum of its proper divisors (1).

121917311 is an equidigital number, since it uses as much as digits as its factorization.

121917311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 26.

The square root of 121917311 is about 11041.6172275623. The cubic root of 121917311 is about 495.8554889770.

The spelling of 121917311 in words is "one hundred twenty-one million, nine hundred seventeen thousand, three hundred eleven".