221110100200 has 72 divisors (see below), whose sum is σ = 565064282790. Its totient is φ = 80403664000.

The previous prime is 221110100147. The next prime is 221110100207. The reversal of 221110100200 is 2001011122.

It can be written as a sum of positive squares in 3 ways, for example, as 193425799204 + 27684300996 = 439802^2 + 166386^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221110100207) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4544191 + ... + 4592590.

Almost surely, 2^221110100200 is an apocalyptic number.

221110100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110100200 is an abundant number, since it is smaller than the sum of its proper divisors (343954182590).

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

221110100200 is a wasteful number, since it uses less digits than its factorization.

221110100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9136819 (or 9136799 counting only the distinct ones).

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

Adding to 221110100200 its reverse (2001011122), we get a palindrome (223111111322).

The spelling of 221110100200 in words is "two hundred twenty-one billion, one hundred ten million, one hundred thousand, two hundred".