12001220565210 has 48 divisors (see below), whose sum is σ = 31553770945320. Its totient is φ = 3164366768640.

The previous prime is 12001220565209. The next prime is 12001220565227. The reversal of 12001220565210 is 1256502210021.

12001220565210 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 1 + 2 + 2 + 0 + 5 + 652 + 1 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7582913256681 + 4418307308529 = 2753709^2 + 2101977^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 749131851 + ... + 749147870.

Almost surely, 2^{12001220565210} is an apocalyptic number.

12001220565210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12001220565210 is an abundant number, since it is smaller than the sum of its proper divisors (19552550380110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12001220565210 is a wasteful number, since it uses less digits than its factorization.

12001220565210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498279823 (or 1498279820 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 12001220565210 its reverse (1256502210021), we get a palindrome (13257722775231).

The spelling of 12001220565210 in words is "twelve trillion, one billion, two hundred twenty million, five hundred sixty-five thousand, two hundred ten".