21022010123320 has 256 divisors, whose sum is σ = 48956510782080. Its totient is φ = 8120618188800.

The previous prime is 21022010123299. The next prime is 21022010123329. The reversal of 21022010123320 is 2332101022012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022010123329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22340074050 + ... + 22340074990.

Almost surely, 2^{21022010123320} is an apocalyptic number.

21022010123320 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 21022010123320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24478255391040).

21022010123320 is an abundant number, since it is smaller than the sum of its proper divisors (27934500658760).

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

21022010123320 is a wasteful number, since it uses less digits than its factorization.

21022010123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706 (or 1702 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21022010123320 its reverse (2332101022012), we get a palindrome (23354111145332).

The spelling of 21022010123320 in words is "twenty-one trillion, twenty-two billion, ten million, one hundred twenty-three thousand, three hundred twenty".