221100110020 has 48 divisors (see below), whose sum is σ = 476436941568. Its totient is φ = 86148034560.

The previous prime is 221100109981. The next prime is 221100110041. The reversal of 221100110020 is 20011001122.

It is a super-4 number, since 4×221100110020⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 221100109979 and 221100110006.

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, 359037 + ... + 755716.

It is an arithmetic number, because the mean of its divisors is an integer number (9925769616).

Almost surely, 2^221100110020 is an apocalyptic number.

221100110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100110020 is an abundant number, since it is smaller than the sum of its proper divisors (255336831548).

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

221100110020 is a wasteful number, since it uses less digits than its factorization.

221100110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115020 (or 1115018 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221100110020 its reverse (20011001122), we get a palindrome (241111111142).

The spelling of 221100110020 in words is "two hundred twenty-one billion, one hundred million, one hundred ten thousand, twenty".