221100002201220 has 96 divisors (see below), whose sum is σ = 641101101903360. Its totient is φ = 56899227240960.

The previous prime is 221100002201189. The next prime is 221100002201249. The reversal of 221100002201220 is 22102200001122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221100002201220.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 569710140 + ... + 570098099.

It is an arithmetic number, because the mean of its divisors is an integer number (6678136478160).

Almost surely, 2^{221100002201220} is an apocalyptic number.

221100002201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100002201220 is an abundant number, since it is smaller than the sum of its proper divisors (420001099702140).

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

221100002201220 is a wasteful number, since it uses less digits than its factorization.

221100002201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139808365 (or 1139808363 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221100002201220 its reverse (22102200001122), we get a palindrome (243202202202342).

The spelling of 221100002201220 in words is "two hundred twenty-one trillion, one hundred billion, two million, two hundred one thousand, two hundred twenty".