21222103320 has 384 divisors, whose sum is σ = 77725327680. Its totient is φ = 4976640000.

The previous prime is 21222103307. The next prime is 21222103367. The reversal of 21222103320 is 2330122212.

21222103320 is a `hidden beast` number, since 2 + 122 + 210 + 332 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21222103293 and 21222103302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 35311020 + ... + 35311620.

Almost surely, 2^21222103320 is an apocalyptic number.

21222103320 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 21222103320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38862663840).

21222103320 is an abundant number, since it is smaller than the sum of its proper divisors (56503224360).

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

21222103320 is a wasteful number, since it uses less digits than its factorization.

21222103320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21222103320 its reverse (2330122212), we get a palindrome (23552225532).

The spelling of 21222103320 in words is "twenty-one billion, two hundred twenty-two million, one hundred three thousand, three hundred twenty".