2021021103 has 16 divisors (see below), whose sum is σ = 2759178240. Its totient is φ = 1315254816.

The previous prime is 2021021087. The next prime is 2021021111. The reversal of 2021021103 is 3011201202.

It is not a de Polignac number, because 2021021103 - 2⁴ = 2021021087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021026103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36426 + ... + 73272.

It is an arithmetic number, because the mean of its divisors is an integer number (172448640).

Almost surely, 2^2021021103 is an apocalyptic number.

2021021103 is a deficient number, since it is larger than the sum of its proper divisors (738157137).

2021021103 is a wasteful number, since it uses less digits than its factorization.

2021021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37286.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2021021103 is about 44955.7682950698. The cubic root of 2021021103 is about 1264.3198295295.

Adding to 2021021103 its reverse (3011201202), we get a palindrome (5032222305).

The spelling of 2021021103 in words is "two billion, twenty-one million, twenty-one thousand, one hundred three".