21113114423 has 16 divisors (see below), whose sum is σ = 22046048640. Its totient is φ = 20202683424.

The previous prime is 21113114413. The next prime is 21113114443. The reversal of 21113114423 is 32441131112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113114423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113114413) 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 15 ways as a sum of consecutive naturals, for example, 729140 + ... + 757542.

It is an arithmetic number, because the mean of its divisors is an integer number (1377878040).

Almost surely, 2^21113114423 is an apocalyptic number.

21113114423 is a deficient number, since it is larger than the sum of its proper divisors (932934217).

21113114423 is a wasteful number, since it uses less digits than its factorization.

21113114423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28798.

The product of its digits is 576, while the sum is 23.

Adding to 21113114423 its reverse (32441131112), we get a palindrome (53554245535).

The spelling of 21113114423 in words is "twenty-one billion, one hundred thirteen million, one hundred fourteen thousand, four hundred twenty-three".