2201020121221 has 8 divisors (see below), whose sum is σ = 2255655679200. Its totient is φ = 2146541338032.

The previous prime is 2201020121177. The next prime is 2201020121257. The reversal of 2201020121221 is 1221210201022.

It is a happy number.

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 2201020121221 - 2⁹ = 2201020120709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201020121195 and 2201020121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201020121281) 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, 39165271 + ... + 39221428.

It is an arithmetic number, because the mean of its divisors is an integer number (281956959900).

Almost surely, 2^{2201020121221} is an apocalyptic number.

It is an amenable number.

2201020121221 is a deficient number, since it is larger than the sum of its proper divisors (54635557979).

2201020121221 is an equidigital number, since it uses as much as digits as its factorization.

2201020121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78387395.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2201020121221 its reverse (1221210201022), we get a palindrome (3422230322243).

The spelling of 2201020121221 in words is "two trillion, two hundred one billion, twenty million, one hundred twenty-one thousand, two hundred twenty-one".