121431383 has 2 divisors, whose sum is σ = 121431384. Its totient is φ = 121431382.

The previous prime is 121431379. The next prime is 121431461. The reversal of 121431383 is 383134121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121431383 - 2² = 121431379 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121431313) 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, 60715691 + 60715692.

It is an arithmetic number, because the mean of its divisors is an integer number (60715692).

Almost surely, 2^121431383 is an apocalyptic number.

121431383 is a deficient number, since it is larger than the sum of its proper divisors (1).

121431383 is an equidigital number, since it uses as much as digits as its factorization.

121431383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 121431383 is about 11019.5908726232. The cubic root of 121431383 is about 495.1958317758.

The spelling of 121431383 in words is "one hundred twenty-one million, four hundred thirty-one thousand, three hundred eighty-three".