21113414123 has 16 divisors (see below), whose sum is σ = 21953580000. Its totient is φ = 20294426880.

The previous prime is 21113414107. The next prime is 21113414171. The reversal of 21113414123 is 32141431112.

It is a cyclic number.

It is not a de Polignac number, because 21113414123 - 2⁴ = 21113414107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113414183) 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, 463628 + ... + 507126.

It is an arithmetic number, because the mean of its divisors is an integer number (1372098750).

Almost surely, 2^21113414123 is an apocalyptic number.

21113414123 is a deficient number, since it is larger than the sum of its proper divisors (840165877).

21113414123 is a wasteful number, since it uses less digits than its factorization.

21113414123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43742.

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

Adding to 21113414123 its reverse (32141431112), we get a palindrome (53254845235).

The spelling of 21113414123 in words is "twenty-one billion, one hundred thirteen million, four hundred fourteen thousand, one hundred twenty-three".