2021100100203 has 4 divisors (see below), whose sum is σ = 2694800133608. Its totient is φ = 1347400066800.

The previous prime is 2021100100199. The next prime is 2021100100219. The reversal of 2021100100203 is 3020010011202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2021100100203 - 2² = 2021100100199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021100100403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336850016698 + ... + 336850016703.

It is an arithmetic number, because the mean of its divisors is an integer number (673700033402).

Almost surely, 2^{2021100100203} is an apocalyptic number.

2021100100203 is a deficient number, since it is larger than the sum of its proper divisors (673700033405).

2021100100203 is an equidigital number, since it uses as much as digits as its factorization.

2021100100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673700033404.

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

Adding to 2021100100203 its reverse (3020010011202), we get a palindrome (5041110111405).

The spelling of 2021100100203 in words is "two trillion, twenty-one billion, one hundred million, one hundred thousand, two hundred three".