21203211033303 has 16 divisors (see below), whose sum is σ = 32048038270080. Its totient is φ = 12361386189024.

The previous prime is 21203211033289. The next prime is 21203211033311. The reversal of 21203211033303 is 30333011230212.

It is not a de Polignac number, because 21203211033303 - 2⁴ = 21203211033287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203211034303) 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 in 15 ways as a sum of consecutive naturals, for example, 14307159201 + ... + 14307160682.

It is an arithmetic number, because the mean of its divisors is an integer number (2003002391880).

Almost surely, 2^{21203211033303} is an apocalyptic number.

21203211033303 is a deficient number, since it is larger than the sum of its proper divisors (10844827236777).

21203211033303 is a wasteful number, since it uses less digits than its factorization.

21203211033303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28614319918.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21203211033303 its reverse (30333011230212), we get a palindrome (51536222263515).

The spelling of 21203211033303 in words is "twenty-one trillion, two hundred three billion, two hundred eleven million, thirty-three thousand, three hundred three".