221110212100 has 36 divisors (see below), whose sum is σ = 482865303844. Its totient is φ = 87880740480.

The previous prime is 221110212083. The next prime is 221110212107. The reversal of 221110212100 is 1212011122.

It can be written as a sum of positive squares in 6 ways, for example, as 62979917764 + 158130294336 = 250958^2 + 397656^2 .

It is not an unprimeable number, because it can be changed into a prime (221110212107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7026027 + ... + 7057426.

Almost surely, 2^221110212100 is an apocalyptic number.

221110212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110212100 is an abundant number, since it is smaller than the sum of its proper divisors (261755091744).

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

221110212100 is a wasteful number, since it uses less digits than its factorization.

221110212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14083624 (or 14083617 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221110212100 its reverse (1212011122), we get a palindrome (222322223222).

The spelling of 221110212100 in words is "two hundred twenty-one billion, one hundred ten million, two hundred twelve thousand, one hundred".