221110022220 has 48 divisors (see below), whose sum is σ = 633505931520. Its totient is φ = 57591446976.

The previous prime is 221110022197. The next prime is 221110022279. The reversal of 221110022220 is 22220011122.

It is a super-2 number, since 2×221110022220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221110022220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42848200 + ... + 42853359.

It is an arithmetic number, because the mean of its divisors is an integer number (13198040240).

Almost surely, 2^221110022220 is an apocalyptic number.

221110022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110022220 is an abundant number, since it is smaller than the sum of its proper divisors (412395909300).

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

221110022220 is a wasteful number, since it uses less digits than its factorization.

221110022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85701614 (or 85701612 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221110022220 its reverse (22220011122), we get a palindrome (243330033342).

The spelling of 221110022220 in words is "two hundred twenty-one billion, one hundred ten million, twenty-two thousand, two hundred twenty".