21114443113 has 4 divisors (see below), whose sum is σ = 21174943300. Its totient is φ = 21053942928.

The previous prime is 21114443111. The next prime is 21114443117. The reversal of 21114443113 is 31134441112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16799529769 + 4314913344 = 129613^2 + 65688^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114443113 - 2¹ = 21114443111 is a prime.

It is a super-2 number, since 2×21114443113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21114443111) 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 3 ways as a sum of consecutive naturals, for example, 30249570 + ... + 30250267.

It is an arithmetic number, because the mean of its divisors is an integer number (5293735825).

Almost surely, 2^21114443113 is an apocalyptic number.

It is an amenable number.

21114443113 is a deficient number, since it is larger than the sum of its proper divisors (60500187).

21114443113 is an equidigital number, since it uses as much as digits as its factorization.

21114443113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60500186.

The product of its digits is 1152, while the sum is 25.

Adding to 21114443113 its reverse (31134441112), we get a palindrome (52248884225).

The spelling of 21114443113 in words is "twenty-one billion, one hundred fourteen million, four hundred forty-three thousand, one hundred thirteen".