21132321132 has 96 divisors (see below), whose sum is σ = 55994283520. Its totient is φ = 6149260800.

The previous prime is 21132321131. The next prime is 21132321143. The reversal of 21132321132 is 23112323112.

It is a super-2 number, since 2×21132321132² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21132321099 and 21132321108.

It is not an unprimeable number, because it can be changed into a prime (21132321131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1775433 + ... + 1787295.

Almost surely, 2^21132321132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21132321132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27997141760).

21132321132 is an abundant number, since it is smaller than the sum of its proper divisors (34861962388).

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

21132321132 is a wasteful number, since it uses less digits than its factorization.

21132321132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12503 (or 12501 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 21132321132 its reverse (23112323112), we get a palindrome (44244644244).

The spelling of 21132321132 in words is "twenty-one billion, one hundred thirty-two million, three hundred twenty-one thousand, one hundred thirty-two".