21322321110 has 192 divisors, whose sum is σ = 58142582784. Its totient is φ = 5415321600.

The previous prime is 21322321109. The next prime is 21322321117. The reversal of 21322321110 is 1112322312.

21322321110 is a `hidden beast` number, since 21 + 322 + 321 + 1 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322321117) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 82966102 + ... + 82966358.

It is an arithmetic number, because the mean of its divisors is an integer number (302825952).

Almost surely, 2^21322321110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21322321110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29071291392).

21322321110 is an abundant number, since it is smaller than the sum of its proper divisors (36820261674).

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

21322321110 is a wasteful number, since it uses less digits than its factorization.

21322321110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21322321110 its reverse (1112322312), we get a palindrome (22434643422).

The spelling of 21322321110 in words is "twenty-one billion, three hundred twenty-two million, three hundred twenty-one thousand, one hundred ten".