12021201220120 has 128 divisors (see below), whose sum is σ = 28282855587840. Its totient is φ = 4593031441920.

The previous prime is 12021201220109. The next prime is 12021201220207. The reversal of 12021201220120 is 2102210212021.

It is a happy number.

It is a super-3 number, since 3×12021201220120³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12021201220094 and 12021201220103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111820314 + ... + 111927766.

It is an arithmetic number, because the mean of its divisors is an integer number (220959809280).

Almost surely, 2^{12021201220120} is an apocalyptic number.

12021201220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021201220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14141427793920).

12021201220120 is an abundant number, since it is smaller than the sum of its proper divisors (16261654367720).

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

12021201220120 is a wasteful number, since it uses less digits than its factorization.

12021201220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108665 (or 108661 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12021201220120 its reverse (2102210212021), we get a palindrome (14123411432141).

The spelling of 12021201220120 in words is "twelve trillion, twenty-one billion, two hundred one million, two hundred twenty thousand, one hundred twenty".