21011303013111 has 40 divisors (see below), whose sum is σ = 31694294146944. Its totient is φ = 13870529482320.

The previous prime is 21011303013083. The next prime is 21011303013167. The reversal of 21011303013111 is 11131030311012.

21011303013111 is a `hidden beast` number, since 2 + 10 + 11 + 30 + 301 + 311 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21011303013111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011303013511) 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, 124618576 + ... + 124787066.

Almost surely, 2^{21011303013111} is an apocalyptic number.

21011303013111 is a deficient number, since it is larger than the sum of its proper divisors (10682991133833).

21011303013111 is a wasteful number, since it uses less digits than its factorization.

21011303013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183553 (or 183544 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 21011303013111 its reverse (11131030311012), we get a palindrome (32142333324123).

The spelling of 21011303013111 in words is "twenty-one trillion, eleven billion, three hundred three million, thirteen thousand, one hundred eleven".