22222021320 has 384 divisors, whose sum is σ = 78432157440. Its totient is φ = 5441863680.

The previous prime is 22222021319. The next prime is 22222021333. The reversal of 22222021320 is 2312022222.

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 = 22222021293 and 22222021302.

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 95 ways as a sum of consecutive naturals, for example, 22744672 + ... + 22745648.

It is an arithmetic number, because the mean of its divisors is an integer number (204250410).

Almost surely, 2^22222021320 is an apocalyptic number.

22222021320 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 22222021320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39216078720).

22222021320 is an abundant number, since it is smaller than the sum of its proper divisors (56210136120).

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

22222021320 is a wasteful number, since it uses less digits than its factorization.

22222021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 22222021320 its reverse (2312022222), we get a palindrome (24534043542).

The spelling of 22222021320 in words is "twenty-two billion, two hundred twenty-two million, twenty-one thousand, three hundred twenty".