221020220200120 has 64 divisors (see below), whose sum is σ = 542891958336000. Its totient is φ = 80313540055680.

The previous prime is 221020220200093. The next prime is 221020220200123. The reversal of 221020220200120 is 21002022020122.

It is a junction number, because it is equal to n+sod(n) for n = 221020220200094 and 221020220200103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020220200123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178912204 + ... + 180143323.

It is an arithmetic number, because the mean of its divisors is an integer number (8482686849000).

Almost surely, 2^{221020220200120} is an apocalyptic number.

221020220200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020220200120 is an abundant number, since it is smaller than the sum of its proper divisors (321871738135880).

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

221020220200120 is a wasteful number, since it uses less digits than its factorization.

221020220200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359056948 (or 359056944 counting only the distinct ones).

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

Adding to 221020220200120 its reverse (21002022020122), we get a palindrome (242022242220242).

The spelling of 221020220200120 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty million, two hundred thousand, one hundred twenty".