21022112222020 has 288 divisors, whose sum is σ = 55037059773696. Its totient is φ = 6604038604800.

The previous prime is 21022112222017. The next prime is 21022112222063. The reversal of 21022112222020 is 2022221122012.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 2445280362 + ... + 2445288958.

It is an arithmetic number, because the mean of its divisors is an integer number (191100901992).

Almost surely, 2^{21022112222020} is an apocalyptic number.

21022112222020 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 21022112222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27518529886848).

21022112222020 is an abundant number, since it is smaller than the sum of its proper divisors (34014947551676).

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

21022112222020 is a wasteful number, since it uses less digits than its factorization.

21022112222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9391 (or 9376 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21022112222020 its reverse (2022221122012), we get a palindrome (23044333344032).

The spelling of 21022112222020 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, two hundred twenty-two thousand, twenty".