21332212132 has 288 divisors, whose sum is σ = 51429095424. Its totient is φ = 7637414400.

The previous prime is 21332212129. The next prime is 21332212163. The reversal of 21332212132 is 23121223312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 257014563 + ... + 257014645.

It is an arithmetic number, because the mean of its divisors is an integer number (178573248).

Almost surely, 2^21332212132 is an apocalyptic number.

21332212132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21332212132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25714547712).

21332212132 is an abundant number, since it is smaller than the sum of its proper divisors (30096883292).

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

21332212132 is a wasteful number, since it uses less digits than its factorization.

21332212132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 270 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 21332212132 its reverse (23121223312), we get a palindrome (44453435444).

The spelling of 21332212132 in words is "twenty-one billion, three hundred thirty-two million, two hundred twelve thousand, one hundred thirty-two".