12021221102020 has 96 divisors (see below), whose sum is σ = 28819021529088. Its totient is φ = 4172668311552.

The previous prime is 12021221101999. The next prime is 12021221102083. The reversal of 12021221102020 is 2020112212021.

It is a happy number.

12021221102020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12021221101985 and 12021221102003.

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, 2238717 + ... + 5390203.

It is an arithmetic number, because the mean of its divisors is an integer number (300198140928).

Almost surely, 2^{12021221102020} is an apocalyptic number.

12021221102020 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 12021221102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14409510764544).

12021221102020 is an abundant number, since it is smaller than the sum of its proper divisors (16797800427068).

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

12021221102020 is a wasteful number, since it uses less digits than its factorization.

12021221102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152389 (or 3152387 counting only the distinct ones).

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

Adding to 12021221102020 its reverse (2020112212021), we get a palindrome (14041333314041).

The spelling of 12021221102020 in words is "twelve trillion, twenty-one billion, two hundred twenty-one million, one hundred two thousand, twenty".