220100221 has 8 divisors (see below), whose sum is σ = 240547104. Its totient is φ = 199726320.

The previous prime is 220100171. The next prime is 220100291. The reversal of 220100221 is 122001022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220100221 - 2²⁵ = 186545789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100198 and 220100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11835 + ... + 24088.

It is an arithmetic number, because the mean of its divisors is an integer number (30068388).

Almost surely, 2^220100221 is an apocalyptic number.

It is an amenable number.

220100221 is a deficient number, since it is larger than the sum of its proper divisors (20446883).

220100221 is a wasteful number, since it uses less digits than its factorization.

220100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36491.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 220100221 is about 14835.7750387366. The cubic root of 220100221 is about 603.7727287344.

Adding to 220100221 its reverse (122001022), we get a palindrome (342101243).

The spelling of 220100221 in words is "two hundred twenty million, one hundred thousand, two hundred twenty-one".