21213321332 has 48 divisors (see below), whose sum is σ = 42580852608. Its totient is φ = 9058452480.

The previous prime is 21213321313. The next prime is 21213321341. The reversal of 21213321332 is 23312331212.

It is a junction number, because it is equal to n+sod(n) for n = 21213321298 and 21213321307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11936828 + ... + 11938604.

It is an arithmetic number, because the mean of its divisors is an integer number (887101096).

Almost surely, 2^21213321332 is an apocalyptic number.

It is an amenable number.

21213321332 is an abundant number, since it is smaller than the sum of its proper divisors (21367531276).

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

21213321332 is a wasteful number, since it uses less digits than its factorization.

21213321332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096 (or 3094 counting only the distinct ones).

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

Adding to 21213321332 its reverse (23312331212), we get a palindrome (44525652544).

The spelling of 21213321332 in words is "twenty-one billion, two hundred thirteen million, three hundred twenty-one thousand, three hundred thirty-two".