200220201221 has 4 divisors (see below), whose sum is σ = 200253683244. Its totient is φ = 200186719200.

The previous prime is 200220201199. The next prime is 200220201227. The reversal of 200220201221 is 122102022002.

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 20646816100 + 179573385121 = 143690^2 + 423761^2 .

It is a cyclic number.

It is not a de Polignac number, because 200220201221 - 2¹⁴ = 200220184837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200220201196 and 200220201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200220201227) 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, 16732040 + ... + 16744001.

It is an arithmetic number, because the mean of its divisors is an integer number (50063420811).

Almost surely, 2^200220201221 is an apocalyptic number.

It is an amenable number.

200220201221 is a deficient number, since it is larger than the sum of its proper divisors (33482023).

200220201221 is an equidigital number, since it uses as much as digits as its factorization.

200220201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33482022.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 200220201221 its reverse (122102022002), we get a palindrome (322322223223).

The spelling of 200220201221 in words is "two hundred billion, two hundred twenty million, two hundred one thousand, two hundred twenty-one".