21304382011011 has 32 divisors (see below), whose sum is σ = 34440466521600. Its totient is φ = 12908318401440.

The previous prime is 21304382010941. The next prime is 21304382011111. The reversal of 21304382011011 is 11011028340312.

21304382011011 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 438 + 201 + 10 + 11 = 666.

It is not a de Polignac number, because 21304382011011 - 2¹⁰ = 21304382009987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21304382011111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8402296 + ... + 10639893.

It is an arithmetic number, because the mean of its divisors is an integer number (1076264578800).

Almost surely, 2^{21304382011011} is an apocalyptic number.

21304382011011 is a deficient number, since it is larger than the sum of its proper divisors (13136084510589).

21304382011011 is a wasteful number, since it uses less digits than its factorization.

21304382011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19045976 (or 19045970 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 21304382011011 in words is "twenty-one trillion, three hundred four billion, three hundred eighty-two million, eleven thousand, eleven".