22021321100 has 144 divisors (see below), whose sum is σ = 52704960000. Its totient is φ = 7953603840.

The previous prime is 22021321079. The next prime is 22021321111. The reversal of 22021321100 is 112312022.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4350371 + ... + 4355429.

Almost surely, 2^22021321100 is an apocalyptic number.

22021321100 is a gapful number since it is divisible by the number (20) 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 22021321100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26352480000).

22021321100 is an abundant number, since it is smaller than the sum of its proper divisors (30683638900).

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

22021321100 is a wasteful number, since it uses less digits than its factorization.

22021321100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200 (or 5193 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 22021321100 its reverse (112312022), we get a palindrome (22133633122).

The spelling of 22021321100 in words is "twenty-two billion, twenty-one million, three hundred twenty-one thousand, one hundred".