121340305 has 16 divisors (see below), whose sum is σ = 154586880. Its totient is φ = 91117312.

The previous prime is 121340299. The next prime is 121340347. The reversal of 121340305 is 503043121.

It is a cyclic number.

It is not a de Polignac number, because 121340305 - 2¹¹ = 121338257 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33912 + ... + 37318.

It is an arithmetic number, because the mean of its divisors is an integer number (9661680).

Almost surely, 2^121340305 is an apocalyptic number.

It is an amenable number.

121340305 is a deficient number, since it is larger than the sum of its proper divisors (33246575).

121340305 is a wasteful number, since it uses less digits than its factorization.

121340305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 121340305 is about 11015.4575483727. The cubic root of 121340305 is about 495.0719957859.

Adding to 121340305 its reverse (503043121), we get a palindrome (624383426).

The spelling of 121340305 in words is "one hundred twenty-one million, three hundred forty thousand, three hundred five".