21313321100232 has 128 divisors (see below), whose sum is σ = 61437960172800. Its totient is φ = 6035251396608.

The previous prime is 21313321100219. The next prime is 21313321100243. The reversal of 21313321100232 is 23200112331312.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 31 ways as a sum of consecutive naturals, for example, 459940168 + ... + 459986504.

It is an arithmetic number, because the mean of its divisors is an integer number (479984063850).

Almost surely, 2^{21313321100232} 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 21313321100232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30718980086400).

21313321100232 is an abundant number, since it is smaller than the sum of its proper divisors (40124639072568).

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

21313321100232 is a wasteful number, since it uses less digits than its factorization.

21313321100232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70695 (or 70691 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21313321100232 its reverse (23200112331312), we get a palindrome (44513433431544).

The spelling of 21313321100232 in words is "twenty-one trillion, three hundred thirteen billion, three hundred twenty-one million, one hundred thousand, two hundred thirty-two".