221020322220 has 48 divisors (see below), whose sum is σ = 687618781920. Its totient is φ = 58938752448.

The previous prime is 221020322219. The next prime is 221020322239. The reversal of 221020322220 is 22223020122.

221020322220 is a `hidden beast` number, since 22 + 102 + 0 + 322 + 220 = 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 = 221020322193 and 221020322202.

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 15 ways as a sum of consecutive naturals, for example, 204647907 + ... + 204648986.

It is an arithmetic number, because the mean of its divisors is an integer number (14325391290).

Almost surely, 2^221020322220 is an apocalyptic number.

221020322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020322220 is an abundant number, since it is smaller than the sum of its proper divisors (466598459700).

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

221020322220 is a wasteful number, since it uses less digits than its factorization.

221020322220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409296911 (or 409296903 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 221020322220 its reverse (22223020122), we get a palindrome (243243342342).

The spelling of 221020322220 in words is "two hundred twenty-one billion, twenty million, three hundred twenty-two thousand, two hundred twenty".