2020021101 has 24 divisors (see below), whose sum is σ = 3442210304. Its totient is φ = 1117061280.

The previous prime is 2020021099. The next prime is 2020021111. The reversal of 2020021101 is 1011200202.

It is not a de Polignac number, because 2020021101 - 2¹ = 2020021099 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 515206 + ... + 519111.

Almost surely, 2^2020021101 is an apocalyptic number.

2020021101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2020021101 is a deficient number, since it is larger than the sum of its proper divisors (1422189203).

2020021101 is a wasteful number, since it uses less digits than its factorization.

2020021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034361 (or 1034358 counting only the distinct ones).

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

The square root of 2020021101 is about 44944.6448534194. The cubic root of 2020021101 is about 1264.1112664847. Note that the first 3 decimals are identical.

Adding to 2020021101 its reverse (1011200202), we get a palindrome (3031221303).

The spelling of 2020021101 in words is "two billion, twenty million, twenty-one thousand, one hundred one".