2021000111020 has 24 divisors (see below), whose sum is σ = 4629927527568. Its totient is φ = 734909131200.

The previous prime is 2021000110999. The next prime is 2021000111023. The reversal of 2021000111020 is 201110001202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2021000110988 and 2021000111006.

It is not an unprimeable number, because it can be changed into a prime (2021000111023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4593181851 + ... + 4593182290.

It is an arithmetic number, because the mean of its divisors is an integer number (192913646982).

Almost surely, 2^{2021000111020} is an apocalyptic number.

2021000111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021000111020 is an abundant number, since it is smaller than the sum of its proper divisors (2608927416548).

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

2021000111020 is a wasteful number, since it uses less digits than its factorization.

2021000111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9186364161 (or 9186364159 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2021000111020 its reverse (201110001202), we get a palindrome (2222110112222).

The spelling of 2021000111020 in words is "two trillion, twenty-one billion, one hundred eleven thousand, twenty".