21443111341 has 4 divisors (see below), whose sum is σ = 21651296992. Its totient is φ = 21234925692.

The previous prime is 21443111303. The next prime is 21443111353. The reversal of 21443111341 is 14311134412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21443111341 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 (21443111441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104092671 + ... + 104092876.

It is an arithmetic number, because the mean of its divisors is an integer number (5412824248).

Almost surely, 2^21443111341 is an apocalyptic number.

It is an amenable number.

21443111341 is a deficient number, since it is larger than the sum of its proper divisors (208185651).

21443111341 is a wasteful number, since it uses less digits than its factorization.

21443111341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208185650.

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

Adding to 21443111341 its reverse (14311134412), we get a palindrome (35754245753).

The spelling of 21443111341 in words is "twenty-one billion, four hundred forty-three million, one hundred eleven thousand, three hundred forty-one".