12021555222020 has 48 divisors (see below), whose sum is σ = 25671540988800. Its totient is φ = 4728030531840.

The previous prime is 12021555221987. The next prime is 12021555222049. The reversal of 12021555222020 is 2022255512021.

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 15 ways as a sum of consecutive naturals, for example, 18546416 + ... + 19183655.

It is an arithmetic number, because the mean of its divisors is an integer number (534823770600).

Almost surely, 2^{12021555222020} is an apocalyptic number.

12021555222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021555222020 is an abundant number, since it is smaller than the sum of its proper divisors (13649985766780).

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

12021555222020 is a wasteful number, since it uses less digits than its factorization.

12021555222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37730348 (or 37730346 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 12021555222020 in words is "twelve trillion, twenty-one billion, five hundred fifty-five million, two hundred twenty-two thousand, twenty".