21113210312203 has 2 divisors, whose sum is σ = 21113210312204. Its totient is φ = 21113210312202.

The previous prime is 21113210312171. The next prime is 21113210312237. The reversal of 21113210312203 is 30221301231112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113210312203 - 2⁵ = 21113210312171 is a prime.

It is not a weakly prime, because it can be changed into another prime (21113210312263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556605156101 + 10556605156102.

It is an arithmetic number, because the mean of its divisors is an integer number (10556605156102).

Almost surely, 2^{21113210312203} is an apocalyptic number.

21113210312203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113210312203 is an equidigital number, since it uses as much as digits as its factorization.

21113210312203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21113210312203 its reverse (30221301231112), we get a palindrome (51334511543315).

The spelling of 21113210312203 in words is "twenty-one trillion, one hundred thirteen billion, two hundred ten million, three hundred twelve thousand, two hundred three".