221110200020 has 24 divisors (see below), whose sum is σ = 465576292104. Its totient is φ = 88206961536.

The previous prime is 221110199971. The next prime is 221110200023. The reversal of 221110200020 is 20002011122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14205302596 + 206904897424 = 119186^2 + 454868^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221110199974 and 221110200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110200023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14812259 + ... + 14827178.

It is an arithmetic number, because the mean of its divisors is an integer number (19399012171).

Almost surely, 2^221110200020 is an apocalyptic number.

221110200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110200020 is an abundant number, since it is smaller than the sum of its proper divisors (244466092084).

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

221110200020 is a wasteful number, since it uses less digits than its factorization.

221110200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29639819 (or 29639817 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221110200020 its reverse (20002011122), we get a palindrome (241112211142).

The spelling of 221110200020 in words is "two hundred twenty-one billion, one hundred ten million, two hundred thousand, twenty".