12020121222020 has 24 divisors (see below), whose sum is σ = 25242358650264. Its totient is φ = 4808028663296.

The previous prime is 12020121221993. The next prime is 12020121222037. The reversal of 12020121222020 is 2022212102021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 394803615556 + 11625317606464 = 628334^2 + 3409592^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12020121222020.

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 7 ways as a sum of consecutive naturals, for example, 4346684 + ... + 6552396.

It is an arithmetic number, because the mean of its divisors is an integer number (1051764943761).

Almost surely, 2^{12020121222020} is an apocalyptic number.

12020121222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020121222020 is an abundant number, since it is smaller than the sum of its proper divisors (13222237428244).

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

12020121222020 is a wasteful number, since it uses less digits than its factorization.

12020121222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478199 (or 2478197 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12020121222020 its reverse (2022212102021), we get a palindrome (14042333324041).

The spelling of 12020121222020 in words is "twelve trillion, twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty".