220200121220221 has 16 divisors (see below), whose sum is σ = 223298699844528. Its totient is φ = 217121937177600.

The previous prime is 220200121220153. The next prime is 220200121220227. The reversal of 220200121220221 is 122022121002022.

It can be written as a sum of positive squares in 8 ways, for example, as 36695547559225 + 183504573660996 = 6057685^2 + 13546386^2 .

It is a cyclic number.

It is not a de Polignac number, because 220200121220221 - 2²⁷ = 220199987002493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220200121220227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225261091 + ... + 226236511.

It is an arithmetic number, because the mean of its divisors is an integer number (13956168740283).

Almost surely, 2^{220200121220221} is an apocalyptic number.

It is an amenable number.

220200121220221 is a deficient number, since it is larger than the sum of its proper divisors (3098578624307).

220200121220221 is a wasteful number, since it uses less digits than its factorization.

220200121220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985872.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 220200121220221 its reverse (122022121002022), we get a palindrome (342222242222243).

The spelling of 220200121220221 in words is "two hundred twenty trillion, two hundred billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".