12221020202020 has 192 divisors, whose sum is σ = 31904983756800. Its totient is φ = 3838827686400.

The previous prime is 12221020201991. The next prime is 12221020202057. The reversal of 12221020202020 is 2020202012221.

It is a super-2 number, since 2×12221020202020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12221020201985 and 12221020202003.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11023441 + ... + 12081319.

It is an arithmetic number, because the mean of its divisors is an integer number (166171790400).

Almost surely, 2^{12221020202020} is an apocalyptic number.

12221020202020 is a gapful number since it is divisible by the number (10) 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 12221020202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15952491878400).

12221020202020 is an abundant number, since it is smaller than the sum of its proper divisors (19683963554780).

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

12221020202020 is a wasteful number, since it uses less digits than its factorization.

12221020202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058058 (or 1058056 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12221020202020 its reverse (2020202012221), we get a palindrome (14241222214241).

The spelling of 12221020202020 in words is "twelve trillion, two hundred twenty-one billion, twenty million, two hundred two thousand, twenty".