21243330411 has 8 divisors (see below), whose sum is σ = 28747193664. Its totient is φ = 13950843720.

The previous prime is 21243330379. The next prime is 21243330421. The reversal of 21243330411 is 11403334212.

It is a happy number.

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

It is not a de Polignac number, because 21243330411 - 2⁵ = 21243330379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21243330421) 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, 52843905 + ... + 52844306.

It is an arithmetic number, because the mean of its divisors is an integer number (3593399208).

Almost surely, 2^21243330411 is an apocalyptic number.

21243330411 is a deficient number, since it is larger than the sum of its proper divisors (7503863253).

21243330411 is a wasteful number, since it uses less digits than its factorization.

21243330411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105688281.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21243330411 its reverse (11403334212), we get a palindrome (32646664623).

The spelling of 21243330411 in words is "twenty-one billion, two hundred forty-three million, three hundred thirty thousand, four hundred eleven".