220112101221021 has 16 divisors (see below), whose sum is σ = 326411386768320. Its totient is φ = 146597677582320.

The previous prime is 220112101220983. The next prime is 220112101221029. The reversal of 220112101221021 is 120122101211022.

220112101221021 is a `hidden beast` number, since 220 + 1 + 1 + 210 + 1 + 2 + 210 + 21 = 666.

It is not a de Polignac number, because 220112101221021 - 2¹⁸ = 220112100958877 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220112101220985 and 220112101221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220112101221029) 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 15 ways as a sum of consecutive naturals, for example, 3992283915 + ... + 3992339048.

It is an arithmetic number, because the mean of its divisors is an integer number (20400711673020).

Almost surely, 2^{220112101221021} is an apocalyptic number.

It is an amenable number.

220112101221021 is a deficient number, since it is larger than the sum of its proper divisors (106299285547299).

220112101221021 is a wasteful number, since it uses less digits than its factorization.

220112101221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7984623993 (or 7984623987 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220112101221021 its reverse (120122101211022), we get a palindrome (340234202432043).

Subtracting from 220112101221021 its reverse (120122101211022), we obtain a palindrome (99990000009999).

The spelling of 220112101221021 in words is "two hundred twenty trillion, one hundred twelve billion, one hundred one million, two hundred twenty-one thousand, twenty-one".