21100211210303 has 16 divisors (see below), whose sum is σ = 21648365278080. Its totient is φ = 20556233657856.

The previous prime is 21100211210249. The next prime is 21100211210311. The reversal of 21100211210303 is 30301211200112.

It is a cyclic number.

It is not a de Polignac number, because 21100211210303 - 2¹⁰ = 21100211209279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100211213303) 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, 45760901 + ... + 46219697.

It is an arithmetic number, because the mean of its divisors is an integer number (1353022829880).

Almost surely, 2^{21100211210303} is an apocalyptic number.

21100211210303 is a deficient number, since it is larger than the sum of its proper divisors (548154067777).

21100211210303 is a wasteful number, since it uses less digits than its factorization.

21100211210303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463346.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21100211210303 its reverse (30301211200112), we get a palindrome (51401422410415).

The spelling of 21100211210303 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, two hundred ten thousand, three hundred three".