221110200220212 has 36 divisors (see below), whose sum is σ = 559444234301316. Its totient is φ = 73633934085120.

The previous prime is 221110200220159. The next prime is 221110200220219. The reversal of 221110200220212 is 212022002011122.

It is a happy number.

221110200220212 is a `hidden beast` number, since 2 + 21 + 1 + 10 + 200 + 220 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 150704742706596 + 70405457513616 = 12276186^2 + 8390796^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110200220219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2894377453 + ... + 2894453844.

It is an arithmetic number, because the mean of its divisors is an integer number (15540117619481).

Almost surely, 2^{221110200220212} is an apocalyptic number.

It is an amenable number.

221110200220212 is an abundant number, since it is smaller than the sum of its proper divisors (338334034081104).

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

221110200220212 is a wasteful number, since it uses less digits than its factorization.

221110200220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788832368 (or 5788832363 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221110200220212 its reverse (212022002011122), we get a palindrome (433132202231334).

The spelling of 221110200220212 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred million, two hundred twenty thousand, two hundred twelve".