20220200221 has 4 divisors (see below), whose sum is σ = 21775600252. Its totient is φ = 18664800192.

The previous prime is 20220200219. The next prime is 20220200227. The reversal of 20220200221 is 12200202202.

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 2561776996 + 17658423225 = 50614^2 + 132885^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220200221 - 2¹ = 20220200219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1555400017 = 20220200221 / (2 + 0 + 2 + 2 + 0 + 2 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220200227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777699996 + ... + 777700021.

It is an arithmetic number, because the mean of its divisors is an integer number (5443900063).

Almost surely, 2^20220200221 is an apocalyptic number.

It is an amenable number.

20220200221 is a deficient number, since it is larger than the sum of its proper divisors (1555400031).

20220200221 is a wasteful number, since it uses less digits than its factorization.

20220200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555400030.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20220200221 its reverse (12200202202), we get a palindrome (32420402423).

The spelling of 20220200221 in words is "twenty billion, two hundred twenty million, two hundred thousand, two hundred twenty-one".