21113404311 has 8 divisors (see below), whose sum is σ = 28255085824. Its totient is φ = 14023662840.

The previous prime is 21113404271. The next prime is 21113404339. The reversal of 21113404311 is 11340431112.

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

It is not a de Polignac number, because 21113404311 - 2⁹ = 21113403799 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 (21113404381) 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, 12984061 + ... + 12985686.

It is an arithmetic number, because the mean of its divisors is an integer number (3531885728).

Almost surely, 2^21113404311 is an apocalyptic number.

21113404311 is a deficient number, since it is larger than the sum of its proper divisors (7141681513).

21113404311 is a wasteful number, since it uses less digits than its factorization.

21113404311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25970021.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21113404311 its reverse (11340431112), we get a palindrome (32453835423).

The spelling of 21113404311 in words is "twenty-one billion, one hundred thirteen million, four hundred four thousand, three hundred eleven".