221110020220 has 24 divisors (see below), whose sum is σ = 484519349664. Its totient is φ = 84598616256.

The previous prime is 221110020217. The next prime is 221110020233. The reversal of 221110020220 is 22020011122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221110020220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240336519 + ... + 240337438.

It is an arithmetic number, because the mean of its divisors is an integer number (20188306236).

Almost surely, 2^221110020220 is an apocalyptic number.

221110020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110020220 is an abundant number, since it is smaller than the sum of its proper divisors (263409329444).

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

221110020220 is a wasteful number, since it uses less digits than its factorization.

221110020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480673989 (or 480673987 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221110020220 its reverse (22020011122), we get a palindrome (243130031342).

The spelling of 221110020220 in words is "two hundred twenty-one billion, one hundred ten million, twenty thousand, two hundred twenty".