213220221100 has 72 divisors (see below), whose sum is σ = 487188418640. Its totient is φ = 80774599680.

The previous prime is 213220221089. The next prime is 213220221163. The reversal of 213220221100 is 1122022312.

It is a happy number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6963424 + ... + 6993976.

Almost surely, 2^213220221100 is an apocalyptic number.

213220221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213220221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243594209320).

213220221100 is an abundant number, since it is smaller than the sum of its proper divisors (273968197540).

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

213220221100 is a wasteful number, since it uses less digits than its factorization.

213220221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34259 (or 34252 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 213220221100 its reverse (1122022312), we get a palindrome (214342243412).

The spelling of 213220221100 in words is "two hundred thirteen billion, two hundred twenty million, two hundred twenty-one thousand, one hundred".