21330133132 has 72 divisors (see below), whose sum is σ = 47591409152. Its totient is φ = 8186317920.

The previous prime is 21330133081. The next prime is 21330133133. The reversal of 21330133132 is 23133103312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (21330133133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180013 + ... + 273979.

Almost surely, 2^21330133132 is an apocalyptic number.

21330133132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21330133132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23795704576).

21330133132 is an abundant number, since it is smaller than the sum of its proper divisors (26261276020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21330133132 is a wasteful number, since it uses less digits than its factorization.

21330133132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94067 (or 94054 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21330133132 its reverse (23133103312), we get a palindrome (44463236444).

The spelling of 21330133132 in words is "twenty-one billion, three hundred thirty million, one hundred thirty-three thousand, one hundred thirty-two".