21132320133 has 16 divisors (see below), whose sum is σ = 28532528640. Its totient is φ = 13911021936.

The previous prime is 21132320093. The next prime is 21132320141. The reversal of 21132320133 is 33102323112.

It is not a de Polignac number, because 21132320133 - 2¹⁶ = 21132254597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132320533) 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 15 ways as a sum of consecutive naturals, for example, 8673 + ... + 205766.

It is an arithmetic number, because the mean of its divisors is an integer number (1783283040).

Almost surely, 2^21132320133 is an apocalyptic number.

It is an amenable number.

21132320133 is a deficient number, since it is larger than the sum of its proper divisors (7400208507).

21132320133 is a wasteful number, since it uses less digits than its factorization.

21132320133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214856.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21132320133 its reverse (33102323112), we get a palindrome (54234643245).

The spelling of 21132320133 in words is "twenty-one billion, one hundred thirty-two million, three hundred twenty thousand, one hundred thirty-three".