21000303211311 has 12 divisors (see below), whose sum is σ = 30411750156840. Its totient is φ = 13964211901680.

The previous prime is 21000303211297. The next prime is 21000303211357. The reversal of 21000303211311 is 11311230300012.

21000303211311 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 0 + 30 + 321 + 1 + 311 = 666.

It is not a de Polignac number, because 21000303211311 - 2⁶ = 21000303211247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000303211411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2999182905 + ... + 2999189906.

It is an arithmetic number, because the mean of its divisors is an integer number (2534312513070).

Almost surely, 2^{21000303211311} is an apocalyptic number.

21000303211311 is a deficient number, since it is larger than the sum of its proper divisors (9411446945529).

21000303211311 is a wasteful number, since it uses less digits than its factorization.

21000303211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998373206 (or 5998373203 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21000303211311 its reverse (11311230300012), we get a palindrome (32311533511323).

The spelling of 21000303211311 in words is "twenty-one trillion, three hundred three million, two hundred eleven thousand, three hundred eleven".