21021303311203 has 16 divisors (see below), whose sum is σ = 22939315106400. Its totient is φ = 19147177969920.

The previous prime is 21021303311189. The next prime is 21021303311231. The reversal of 21021303311203 is 30211330312012.

It is not a de Polignac number, because 21021303311203 - 2⁹ = 21021303310691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021303311243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17933748 + ... + 19069921.

It is an arithmetic number, because the mean of its divisors is an integer number (1433707194150).

Almost surely, 2^{21021303311203} is an apocalyptic number.

21021303311203 is a deficient number, since it is larger than the sum of its proper divisors (1918011795197).

21021303311203 is a wasteful number, since it uses less digits than its factorization.

21021303311203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37004262.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21021303311203 its reverse (30211330312012), we get a palindrome (51232633623215).

The spelling of 21021303311203 in words is "twenty-one trillion, twenty-one billion, three hundred three million, three hundred eleven thousand, two hundred three".