12111220101220 has 12 divisors (see below), whose sum is σ = 25433562212604. Its totient is φ = 4844488040480.

The previous prime is 12111220101151. The next prime is 12111220101223. The reversal of 12111220101220 is 2210102211121.

It can be written as a sum of positive squares in 2 ways, for example, as 8996496341056 + 3114723760164 = 2999416^2 + 1764858^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12111220101194 and 12111220101203.

It is not an unprimeable number, because it can be changed into a prime (12111220101223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302780502511 + ... + 302780502550.

It is an arithmetic number, because the mean of its divisors is an integer number (2119463517717).

Almost surely, 2^{12111220101220} is an apocalyptic number.

12111220101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111220101220 is an abundant number, since it is smaller than the sum of its proper divisors (13322342111384).

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

12111220101220 is a wasteful number, since it uses less digits than its factorization.

12111220101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605561005070 (or 605561005068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12111220101220 its reverse (2210102211121), we get a palindrome (14321322312341).

The spelling of 12111220101220 in words is "twelve trillion, one hundred eleven billion, two hundred twenty million, one hundred one thousand, two hundred twenty".