2021021021120 has 112 divisors (see below), whose sum is σ = 4991565234528. Its totient is φ = 778771353600.

The previous prime is 2021021021099. The next prime is 2021021021137. The reversal of 2021021021120 is 211201201202.

It is a junction number, because it is equal to n+sod(n) for n = 2021021021095 and 2021021021104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350819 + ... + 2040861.

Almost surely, 2^{2021021021120} is an apocalyptic number.

2021021021120 is a gapful number since it is divisible by the number (20) 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 2021021021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2495782617264).

2021021021120 is an abundant number, since it is smaller than the sum of its proper divisors (2970544213408).

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

2021021021120 is a wasteful number, since it uses less digits than its factorization.

2021021021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690198 (or 1690188 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021021021120 its reverse (211201201202), we get a palindrome (2232222222322).

The spelling of 2021021021120 in words is "two trillion, twenty-one billion, twenty-one million, twenty-one thousand, one hundred twenty".