21110111133 has 8 divisors (see below), whose sum is σ = 28155283200. Its totient is φ = 14069173248.

The previous prime is 21110111111. The next prime is 21110111149. The reversal of 21110111133 is 33111101112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21110111133 - 2⁸ = 21110110877 is a prime.

It is a super-2 number, since 2×21110111133² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110111333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046893 + ... + 1066866.

It is an arithmetic number, because the mean of its divisors is an integer number (3519410400).

Almost surely, 2^21110111133 is an apocalyptic number.

It is an amenable number.

21110111133 is a deficient number, since it is larger than the sum of its proper divisors (7045172067).

21110111133 is a wasteful number, since it uses less digits than its factorization.

21110111133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117091.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 21110111133 its reverse (33111101112), we get a palindrome (54221212245).

The spelling of 21110111133 in words is "twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred thirty-three".