121345305 has 32 divisors (see below), whose sum is σ = 208742400. Its totient is φ = 60000192.

The previous prime is 121345283. The next prime is 121345313. The reversal of 121345305 is 503543121.

It is not a de Polignac number, because 121345305 - 2¹⁰ = 121344281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8866 + ... + 17924.

It is an arithmetic number, because the mean of its divisors is an integer number (6523200).

Almost surely, 2^121345305 is an apocalyptic number.

121345305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121345305 is a deficient number, since it is larger than the sum of its proper divisors (87397095).

121345305 is a wasteful number, since it uses less digits than its factorization.

121345305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9133.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 121345305 is about 11015.6844998393. The cubic root of 121345305 is about 495.0787957412.

Adding to 121345305 its reverse (503543121), we get a palindrome (624888426).

The spelling of 121345305 in words is "one hundred twenty-one million, three hundred forty-five thousand, three hundred five".