20221220221020 has 192 divisors, whose sum is σ = 77428262231040. Its totient is φ = 4266455245056.

The previous prime is 20221220220991. The next prime is 20221220221043. The reversal of 20221220221020 is 2012202212202.

20221220221020 is a `hidden beast` number, since 2 + 0 + 221 + 220 + 221 + 0 + 2 + 0 = 666.

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 = 20221220220984 and 20221220221002.

It is a congruent number.

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, 205701982 + ... + 205800261.

It is an arithmetic number, because the mean of its divisors is an integer number (403272199120).

Almost surely, 2^{20221220221020} is an apocalyptic number.

20221220221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221220221020 is an abundant number, since it is smaller than the sum of its proper divisors (57207042010020).

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

20221220221020 is a wasteful number, since it uses less digits than its factorization.

20221220221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411502281 (or 411502273 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20221220221020 its reverse (2012202212202), we get a palindrome (22233422433222).

The spelling of 20221220221020 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, twenty".