20022020221 has 32 divisors (see below), whose sum is σ = 23312240640. Its totient is φ = 16843545600.

The previous prime is 20022020209. The next prime is 20022020261. The reversal of 20022020221 is 12202022002.

It is not a de Polignac number, because 20022020221 - 2¹¹ = 20022018173 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 (20022020261) 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 31 ways as a sum of consecutive naturals, for example, 51470295 + ... + 51470683.

It is an arithmetic number, because the mean of its divisors is an integer number (728507520).

Almost surely, 2^20022020221 is an apocalyptic number.

It is an amenable number.

20022020221 is a deficient number, since it is larger than the sum of its proper divisors (3290220419).

20022020221 is a wasteful number, since it uses less digits than its factorization.

20022020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005.

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

Adding to 20022020221 its reverse (12202022002), we get a palindrome (32224042223).

The spelling of 20022020221 in words is "twenty billion, twenty-two million, twenty thousand, two hundred twenty-one".