221020000220 has 24 divisors (see below), whose sum is σ = 464159725008. Its totient is φ = 88404624000.

The previous prime is 221020000219. The next prime is 221020000319. The reversal of 221020000220 is 22000020122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364040 + ... + 758000.

It is an arithmetic number, because the mean of its divisors is an integer number (19339988542).

Almost surely, 2^221020000220 is an apocalyptic number.

221020000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020000220 is an abundant number, since it is smaller than the sum of its proper divisors (243139724788).

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

221020000220 is a wasteful number, since it uses less digits than its factorization.

221020000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422021 (or 422019 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 221020000220 its reverse (22000020122), we get a palindrome (243020020342).

The spelling of 221020000220 in words is "two hundred twenty-one billion, twenty million, two hundred twenty", and thus it is an aban number.