21223331120 has 80 divisors (see below), whose sum is σ = 50578429440. Its totient is φ = 8277679872.

The previous prime is 21223331093. The next prime is 21223331141. The reversal of 21223331120 is 2113332212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21223331092 and 21223331101.

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 15 ways as a sum of consecutive naturals, for example, 2124377 + ... + 2134343.

It is an arithmetic number, because the mean of its divisors is an integer number (632230368).

Almost surely, 2^21223331120 is an apocalyptic number.

21223331120 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 21223331120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25289214720).

21223331120 is an abundant number, since it is smaller than the sum of its proper divisors (29355098320).

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

21223331120 is a wasteful number, since it uses less digits than its factorization.

21223331120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10642 (or 10636 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21223331120 its reverse (2113332212), we get a palindrome (23336663332).

The spelling of 21223331120 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty-one thousand, one hundred twenty".