12001111201220 has 12 divisors (see below), whose sum is σ = 25202333522604. Its totient is φ = 4800444480480.

The previous prime is 12001111201187. The next prime is 12001111201249. The reversal of 12001111201220 is 2210211110021.

It can be written as a sum of positive squares in 2 ways, for example, as 2881580940484 + 9119530260736 = 1697522^2 + 3019856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12001111201195 and 12001111201204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300027780011 + ... + 300027780050.

It is an arithmetic number, because the mean of its divisors is an integer number (2100194460217).

Almost surely, 2^{12001111201220} is an apocalyptic number.

12001111201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001111201220 is an abundant number, since it is smaller than the sum of its proper divisors (13201222321384).

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

12001111201220 is a wasteful number, since it uses less digits than its factorization.

12001111201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600055560070 (or 600055560068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12001111201220 its reverse (2210211110021), we get a palindrome (14211322311241).

The spelling of 12001111201220 in words is "twelve trillion, one billion, one hundred eleven million, two hundred one thousand, two hundred twenty".