21100302203 has 2 divisors, whose sum is σ = 21100302204. Its totient is φ = 21100302202.

The previous prime is 21100302193. The next prime is 21100302217. The reversal of 21100302203 is 30220300112.

It is a happy number.

It is an a-pointer prime, because the next prime (21100302217) can be obtained adding 21100302203 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21100302203 - 2¹⁴ = 21100285819 is a prime.

It is not a weakly prime, because it can be changed into another prime (21100302803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550151101 + 10550151102.

It is an arithmetic number, because the mean of its divisors is an integer number (10550151102).

Almost surely, 2^21100302203 is an apocalyptic number.

21100302203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100302203 is an equidigital number, since it uses as much as digits as its factorization.

21100302203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21100302203 its reverse (30220300112), we get a palindrome (51320602315).

The spelling of 21100302203 in words is "twenty-one billion, one hundred million, three hundred two thousand, two hundred three".