221112200020 has 12 divisors (see below), whose sum is σ = 464335620084. Its totient is φ = 88444880000.

The previous prime is 221112199981. The next prime is 221112200021. The reversal of 221112200020 is 20002211122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 133512775236 + 87599424784 = 365394^2 + 295972^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112200021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5527804981 + ... + 5527805020.

It is an arithmetic number, because the mean of its divisors is an integer number (38694635007).

Almost surely, 2^221112200020 is an apocalyptic number.

221112200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112200020 is an abundant number, since it is smaller than the sum of its proper divisors (243223420064).

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

221112200020 is a wasteful number, since it uses less digits than its factorization.

221112200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11055610010 (or 11055610008 counting only the distinct ones).

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

Adding to 221112200020 its reverse (20002211122), we get a palindrome (241114411142).

The spelling of 221112200020 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred thousand, twenty".