220112221222001 has 4 divisors (see below), whose sum is σ = 220154477364900. Its totient is φ = 220069965079104.

The previous prime is 220112221221989. The next prime is 220112221222007. The reversal of 220112221222001 is 100222122211022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 210260005119025 + 9852216102976 = 14500345^2 + 3138824^2 .

It is a cyclic number.

It is not a de Polignac number, because 220112221222001 - 2²² = 220112217027697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220112221222007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21128063636 + ... + 21128074053.

It is an arithmetic number, because the mean of its divisors is an integer number (55038619341225).

Almost surely, 2^{220112221222001} is an apocalyptic number.

It is an amenable number.

220112221222001 is a deficient number, since it is larger than the sum of its proper divisors (42256142899).

220112221222001 is an equidigital number, since it uses as much as digits as its factorization.

220112221222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42256142898.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 220112221222001 its reverse (100222122211022), we get a palindrome (320334343433023).

The spelling of 220112221222001 in words is "two hundred twenty trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, one".