21113034111 has 48 divisors (see below), whose sum is σ = 35973624960. Its totient is φ = 11806663680.

The previous prime is 21113034073. The next prime is 21113034133. The reversal of 21113034111 is 11143031112.

It is a happy number.

It is not a de Polignac number, because 21113034111 - 2¹⁷ = 21112903039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113034181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125335 + ... + 240696.

It is an arithmetic number, because the mean of its divisors is an integer number (749450520).

Almost surely, 2^21113034111 is an apocalyptic number.

21113034111 is a deficient number, since it is larger than the sum of its proper divisors (14860590849).

21113034111 is a wasteful number, since it uses less digits than its factorization.

21113034111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366096 (or 366093 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21113034111 its reverse (11143031112), we get a palindrome (32256065223).

The spelling of 21113034111 in words is "twenty-one billion, one hundred thirteen million, thirty-four thousand, one hundred eleven".