21342144113 has 4 divisors (see below), whose sum is σ = 21342689508. Its totient is φ = 21341598720.

The previous prime is 21342144071. The next prime is 21342144121. The reversal of 21342144113 is 31144124312.

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 5217461824 + 16124682289 = 72232^2 + 126983^2 .

It is a cyclic number.

It is not a de Polignac number, because 21342144113 - 2¹⁰ = 21342143089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342144013) 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, 209048 + ... + 293913.

It is an arithmetic number, because the mean of its divisors is an integer number (5335672377).

Almost surely, 2^21342144113 is an apocalyptic number.

It is an amenable number.

21342144113 is a deficient number, since it is larger than the sum of its proper divisors (545395).

21342144113 is an equidigital number, since it uses as much as digits as its factorization.

21342144113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545394.

The product of its digits is 2304, while the sum is 26.

Adding to 21342144113 its reverse (31144124312), we get a palindrome (52486268425).

The spelling of 21342144113 in words is "twenty-one billion, three hundred forty-two million, one hundred forty-four thousand, one hundred thirteen".