21133123232 has 48 divisors (see below), whose sum is σ = 47441965032. Its totient is φ = 9179996160.

The previous prime is 21133123229. The next prime is 21133123259. The reversal of 21133123232 is 23232133112.

It can be written as a sum of positive squares in 4 ways, for example, as 20310810256 + 822312976 = 142516^2 + 28676^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21133123198 and 21133123207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487069 + ... + 1501212.

Almost surely, 2^21133123232 is an apocalyptic number.

It is an amenable number.

21133123232 is an abundant number, since it is smaller than the sum of its proper divisors (26308841800).

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

21133123232 is a wasteful number, since it uses less digits than its factorization.

21133123232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988321 (or 2988313 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

Adding to 21133123232 its reverse (23232133112), we get a palindrome (44365256344).

The spelling of 21133123232 in words is "twenty-one billion, one hundred thirty-three million, one hundred twenty-three thousand, two hundred thirty-two".