21110313111 has 32 divisors (see below), whose sum is σ = 29083008768. Its totient is φ = 13610488320.

The previous prime is 21110313097. The next prime is 21110313137. The reversal of 21110313111 is 11131301112.

It is not a de Polignac number, because 21110313111 - 2²¹ = 21108215959 is a prime.

It is a super-3 number, since 3×21110313111³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110313181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16275615 + ... + 16276911.

It is an arithmetic number, because the mean of its divisors is an integer number (908844024).

Almost surely, 2^21110313111 is an apocalyptic number.

21110313111 is a deficient number, since it is larger than the sum of its proper divisors (7972695657).

21110313111 is a wasteful number, since it uses less digits than its factorization.

21110313111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

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

Adding to 21110313111 its reverse (11131301112), we get a palindrome (32241614223).

The spelling of 21110313111 in words is "twenty-one billion, one hundred ten million, three hundred thirteen thousand, one hundred eleven".