121020505 has 8 divisors (see below), whose sum is σ = 147686400. Its totient is φ = 95175216.

The previous prime is 121020463. The next prime is 121020521. The reversal of 121020505 is 505020121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121020505 - 2⁹ = 121019993 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 7 ways as a sum of consecutive naturals, for example, 204825 + ... + 205414.

It is an arithmetic number, because the mean of its divisors is an integer number (18460800).

Almost surely, 2^121020505 is an apocalyptic number.

It is an amenable number.

121020505 is a deficient number, since it is larger than the sum of its proper divisors (26665895).

121020505 is an equidigital number, since it uses as much as digits as its factorization.

121020505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410303.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 121020505 is about 11000.9320059711. The cubic root of 121020505 is about 494.6366820093.

Adding to 121020505 its reverse (505020121), we get a palindrome (626040626).

The spelling of 121020505 in words is "one hundred twenty-one million, twenty thousand, five hundred five".