21133110132 has 36 divisors (see below), whose sum is σ = 53447617860. Its totient is φ = 7040702592.

The previous prime is 21133110121. The next prime is 21133110133. The reversal of 21133110132 is 23101133112.

It can be written as a sum of positive squares in 2 ways, for example, as 15226572816 + 5906537316 = 123396^2 + 76854^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133110133) 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 11 ways as a sum of consecutive naturals, for example, 82257 + ... + 221432.

Almost surely, 2^21133110132 is an apocalyptic number.

It is an amenable number.

21133110132 is an abundant number, since it is smaller than the sum of its proper divisors (32314507728).

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

21133110132 is a wasteful number, since it uses less digits than its factorization.

21133110132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305632 (or 305627 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21133110132 its reverse (23101133112), we get a palindrome (44234243244).

The spelling of 21133110132 in words is "twenty-one billion, one hundred thirty-three million, one hundred ten thousand, one hundred thirty-two".