20220220221 has 16 divisors (see below), whose sum is σ = 27156724224. Its totient is φ = 13382140464.

The previous prime is 20220220219. The next prime is 20220220259. The reversal of 20220220221 is 12202202202.

It is not a de Polignac number, because 20220220221 - 2¹ = 20220220219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20220220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220220201) 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 15 ways as a sum of consecutive naturals, for example, 368646 + ... + 419928.

It is an arithmetic number, because the mean of its divisors is an integer number (1697295264).

Almost surely, 2^20220220221 is an apocalyptic number.

It is an amenable number.

20220220221 is a deficient number, since it is larger than the sum of its proper divisors (6936504003).

20220220221 is a wasteful number, since it uses less digits than its factorization.

20220220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52240.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20220220221 its reverse (12202202202), we get a palindrome (32422422423).

The spelling of 20220220221 in words is "twenty billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty-one".