121220302305 has 32 divisors (see below), whose sum is σ = 197526251520. Its totient is φ = 63462755520.

The previous prime is 121220302277. The next prime is 121220302337. The reversal of 121220302305 is 503203022121.

It is not a de Polignac number, because 121220302305 - 2⁶ = 121220302241 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 512424 + ... + 710646.

It is an arithmetic number, because the mean of its divisors is an integer number (6172695360).

Almost surely, 2^121220302305 is an apocalyptic number.

121220302305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121220302305 is a deficient number, since it is larger than the sum of its proper divisors (76305949215).

121220302305 is a wasteful number, since it uses less digits than its factorization.

121220302305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198981.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 121220302305 its reverse (503203022121), we get a palindrome (624423324426).

The spelling of 121220302305 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred two thousand, three hundred five".