2101210100203 has 4 divisors (see below), whose sum is σ = 2107966403088. Its totient is φ = 2094453797320.

The previous prime is 2101210100117. The next prime is 2101210100233. The reversal of 2101210100203 is 3020010121012.

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

It is a cyclic number.

It is not a de Polignac number, because 2101210100203 - 2²¹ = 2101208003051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101210100233) 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, 3378150976 + ... + 3378151597.

It is an arithmetic number, because the mean of its divisors is an integer number (526991600772).

Almost surely, 2^{2101210100203} is an apocalyptic number.

2101210100203 is a deficient number, since it is larger than the sum of its proper divisors (6756302885).

2101210100203 is an equidigital number, since it uses as much as digits as its factorization.

2101210100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756302884.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2101210100203 its reverse (3020010121012), we get a palindrome (5121220221215).

The spelling of 2101210100203 in words is "two trillion, one hundred one billion, two hundred ten million, one hundred thousand, two hundred three".