2020101000021 has 12 divisors (see below), whose sum is σ = 3142379333548. Its totient is φ = 1243139076864.

The previous prime is 2020101000011. The next prime is 2020101000037. The reversal of 2020101000021 is 1200001010202.

It can be written as a sum of positive squares in 2 ways, for example, as 1272126828996 + 747974171025 = 1127886^2 + 864855^2 .

It is not a de Polignac number, because 2020101000021 - 2⁷ = 2020100999893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2020100999967 and 2020101000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020101000011) 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 11 ways as a sum of consecutive naturals, for example, 8632910140 + ... + 8632910373.

Almost surely, 2^{2020101000021} is an apocalyptic number.

It is an amenable number.

2020101000021 is a deficient number, since it is larger than the sum of its proper divisors (1122278333527).

2020101000021 is a wasteful number, since it uses less digits than its factorization.

2020101000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17265820532 (or 17265820529 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2020101000021 its reverse (1200001010202), we get a palindrome (3220102010223).

The spelling of 2020101000021 in words is "two trillion, twenty billion, one hundred one million, twenty-one", and thus it is an aban number.