21043120322203 has 40 divisors (see below), whose sum is σ = 25956781849600. Its totient is φ = 17011012135824.

The previous prime is 21043120322177. The next prime is 21043120322243. The reversal of 21043120322203 is 30222302134012.

It is not a de Polignac number, because 21043120322203 - 2¹⁷ = 21043120191131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21043120322243) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9138778 + ... + 11207296.

It is an arithmetic number, because the mean of its divisors is an integer number (648919546240).

Almost surely, 2^{21043120322203} is an apocalyptic number.

21043120322203 is a deficient number, since it is larger than the sum of its proper divisors (4913661527397).

21043120322203 is an equidigital number, since it uses as much as digits as its factorization.

21043120322203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068789 (or 2068768 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21043120322203 its reverse (30222302134012), we get a palindrome (51265422456215).

The spelling of 21043120322203 in words is "twenty-one trillion, forty-three billion, one hundred twenty million, three hundred twenty-two thousand, two hundred three".