220120002001 has 4 divisors (see below), whose sum is σ = 220125250404. Its totient is φ = 220114753600.

The previous prime is 220120001993. The next prime is 220120002023. The reversal of 220120002001 is 100200021022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100200021022 = 2 ⋅50100010511.

It can be written as a sum of positive squares in 2 ways, for example, as 157707471376 + 62412530625 = 397124^2 + 249825^2 .

It is a cyclic number.

It is not a de Polignac number, because 220120002001 - 2³ = 220120001993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220120002031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2560780 + ... + 2645341.

It is an arithmetic number, because the mean of its divisors is an integer number (55031312601).

Almost surely, 2^220120002001 is an apocalyptic number.

It is an amenable number.

220120002001 is a deficient number, since it is larger than the sum of its proper divisors (5248403).

220120002001 is an equidigital number, since it uses as much as digits as its factorization.

220120002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5248402.

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

Adding to 220120002001 its reverse (100200021022), we get a palindrome (320320023023).

The spelling of 220120002001 in words is "two hundred twenty billion, one hundred twenty million, two thousand, one".