21103423411 has 8 divisors (see below), whose sum is σ = 24119078400. Its totient is φ = 18087988488.

The previous prime is 21103423403. The next prime is 21103423417. The reversal of 21103423411 is 11432430112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21103423411 - 2³ = 21103423403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103423417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331980 + ... + 390406.

It is an arithmetic number, because the mean of its divisors is an integer number (3014884800).

Almost surely, 2^21103423411 is an apocalyptic number.

21103423411 is a deficient number, since it is larger than the sum of its proper divisors (3015654989).

21103423411 is an equidigital number, since it uses as much as digits as its factorization.

21103423411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110033.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21103423411 its reverse (11432430112), we get a palindrome (32535853523).

The spelling of 21103423411 in words is "twenty-one billion, one hundred three million, four hundred twenty-three thousand, four hundred eleven".