21211321332 has 48 divisors (see below), whose sum is σ = 51196723200. Its totient is φ = 6828019680.

The previous prime is 21211321321. The next prime is 21211321357. The reversal of 21211321332 is 23312311212.

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 = 21211321299 and 21211321308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118669 + ... + 237707.

It is an arithmetic number, because the mean of its divisors is an integer number (1066598400).

Almost surely, 2^21211321332 is an apocalyptic number.

It is an amenable number.

21211321332 is an abundant number, since it is smaller than the sum of its proper divisors (29985401868).

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

21211321332 is a wasteful number, since it uses less digits than its factorization.

21211321332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119556 (or 119554 counting only the distinct ones).

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

Adding to 21211321332 its reverse (23312311212), we get a palindrome (44523632544).

The spelling of 21211321332 in words is "twenty-one billion, two hundred eleven million, three hundred twenty-one thousand, three hundred thirty-two".