220221221121 has 64 divisors (see below), whose sum is σ = 364367984640. Its totient is φ = 130299865920.

The previous prime is 220221221113. The next prime is 220221221141. The reversal of 220221221121 is 121122122022.

It is a happy number.

220221221121 is a `hidden beast` number, since 220 + 2 + 212 + 211 + 21 = 666.

It is not a de Polignac number, because 220221221121 - 2³ = 220221221113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220221221094 and 220221221103.

It is not an unprimeable number, because it can be changed into a prime (220221221111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44913156 + ... + 44918058.

It is an arithmetic number, because the mean of its divisors is an integer number (5693249760).

Almost surely, 2^220221221121 is an apocalyptic number.

It is an amenable number.

220221221121 is a deficient number, since it is larger than the sum of its proper divisors (144146763519).

220221221121 is a wasteful number, since it uses less digits than its factorization.

220221221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8483 (or 8477 counting only the distinct ones).

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

Adding to 220221221121 its reverse (121122122022), we get a palindrome (341343343143).

Subtracting from 220221221121 its reverse (121122122022), we obtain a palindrome (99099099099).

The spelling of 220221221121 in words is "two hundred twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".