20121205330 has 16 divisors (see below), whose sum is σ = 36223176024. Its totient is φ = 8047369600.

The previous prime is 20121205327. The next prime is 20121205331. The reversal of 20121205330 is 3350212102.

It can be written as a sum of positive squares in 4 ways, for example, as 15780635641 + 4340569689 = 125621^2 + 65883^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20121205298 and 20121205307.

It is not an unprimeable number, because it can be changed into a prime (20121205331) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 61021 + ... + 209680.

Almost surely, 2^20121205330 is an apocalyptic number.

20121205330 is a deficient number, since it is larger than the sum of its proper divisors (16101970694).

20121205330 is a wasteful number, since it uses less digits than its factorization.

20121205330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278141.

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

Adding to 20121205330 its reverse (3350212102), we get a palindrome (23471417432).

The spelling of 20121205330 in words is "twenty billion, one hundred twenty-one million, two hundred five thousand, three hundred thirty".