121310305 has 16 divisors (see below), whose sum is σ = 148544640. Its totient is φ = 95084928.

The previous prime is 121310297. The next prime is 121310311. The reversal of 121310305 is 503013121.

It is a cyclic number.

It is not a de Polignac number, because 121310305 - 2³ = 121310297 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, 58476 + ... + 60514.

It is an arithmetic number, because the mean of its divisors is an integer number (9284040).

Almost surely, 2^121310305 is an apocalyptic number.

It is an amenable number.

121310305 is a deficient number, since it is larger than the sum of its proper divisors (27234335).

121310305 is a wasteful number, since it uses less digits than its factorization.

121310305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 121310305 is about 11014.0957413671. The cubic root of 121310305 is about 495.0311921302.

Adding to 121310305 its reverse (503013121), we get a palindrome (624323426).

The spelling of 121310305 in words is "one hundred twenty-one million, three hundred ten thousand, three hundred five".