2021020004120 has 64 divisors (see below), whose sum is σ = 4897613276640. Its totient is φ = 746142566400.

The previous prime is 2021020004117. The next prime is 2021020004189. The reversal of 2021020004120 is 214000201202.

It is a junction number, because it is equal to n+sod(n) for n = 2021020004095 and 2021020004104.

It is a congruent number.

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, 4746815 + ... + 5155025.

Almost surely, 2^{2021020004120} is an apocalyptic number.

2021020004120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021020004120 is an abundant number, since it is smaller than the sum of its proper divisors (2876593272520).

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

2021020004120 is a wasteful number, since it uses less digits than its factorization.

2021020004120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417756 (or 417752 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2021020004120 its reverse (214000201202), we get a palindrome (2235020205322).

The spelling of 2021020004120 in words is "two trillion, twenty-one billion, twenty million, four thousand, one hundred twenty".