21320330443111 has 32 divisors (see below), whose sum is σ = 24841350269568. Its totient is φ = 17921634877440.

The previous prime is 21320330443091. The next prime is 21320330443117. The reversal of 21320330443111 is 11134403302312.

It is not a de Polignac number, because 21320330443111 - 2¹⁵ = 21320330410343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21320330443111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320330443117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326901141 + ... + 326966353.

It is an arithmetic number, because the mean of its divisors is an integer number (776292195924).

Almost surely, 2^{21320330443111} is an apocalyptic number.

21320330443111 is a deficient number, since it is larger than the sum of its proper divisors (3521019826457).

21320330443111 is a wasteful number, since it uses less digits than its factorization.

21320330443111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69691.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 21320330443111 its reverse (11134403302312), we get a palindrome (32454733745423).

The spelling of 21320330443111 in words is "twenty-one trillion, three hundred twenty billion, three hundred thirty million, four hundred forty-three thousand, one hundred eleven".