2021010120020 has 36 divisors (see below), whose sum is σ = 4245995442780. Its totient is φ = 808047212544.

The previous prime is 2021010119981. The next prime is 2021010120067. The reversal of 2021010120020 is 200210101202.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 520135209616 + 1500874910404 = 721204^2 + 1225102^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021010119983 and 2021010120010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147200516 + ... + 147214244.

It is an arithmetic number, because the mean of its divisors is an integer number (117944317855).

Almost surely, 2^{2021010120020} is an apocalyptic number.

2021010120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021010120020 is an abundant number, since it is smaller than the sum of its proper divisors (2224985322760).

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

2021010120020 is an equidigital number, since it uses as much as digits as its factorization.

2021010120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19164 (or 16449 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2021010120020 its reverse (200210101202), we get a palindrome (2221220221222).

The spelling of 2021010120020 in words is "two trillion, twenty-one billion, ten million, one hundred twenty thousand, twenty".