2021112110020 has 48 divisors (see below), whose sum is σ = 4468658443200. Its totient is φ = 765734497920.

The previous prime is 2021112110011. The next prime is 2021112110021. The reversal of 2021112110020 is 200112111202.

It is a super-2 number, since 2×2021112110020² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021112110021) by changing a digit.

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, 1264515 + ... + 2375125.

It is an arithmetic number, because the mean of its divisors is an integer number (93097050900).

Almost surely, 2^{2021112110020} is an apocalyptic number.

2021112110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021112110020 is an abundant number, since it is smaller than the sum of its proper divisors (2447546333180).

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

2021112110020 is a wasteful number, since it uses less digits than its factorization.

2021112110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115428 (or 1115426 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021112110020 its reverse (200112111202), we get a palindrome (2221224221222).

The spelling of 2021112110020 in words is "two trillion, twenty-one billion, one hundred twelve million, one hundred ten thousand, twenty".