20002002220221 has 32 divisors (see below), whose sum is σ = 32084199413760. Its totient is φ = 10827885854016.

The previous prime is 20002002220121. The next prime is 20002002220261. The reversal of 20002002220221 is 12202220020002.

It is not a de Polignac number, because 20002002220221 - 2⁷ = 20002002220093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20002002220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002002220261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16242600 + ... + 17430606.

It is an arithmetic number, because the mean of its divisors is an integer number (1002631231680).

Almost surely, 2^{20002002220221} is an apocalyptic number.

20002002220221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20002002220221 is a deficient number, since it is larger than the sum of its proper divisors (12082197193539).

20002002220221 is a wasteful number, since it uses less digits than its factorization.

20002002220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230233.

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

Adding to 20002002220221 its reverse (12202220020002), we get a palindrome (32204222240223).

The spelling of 20002002220221 in words is "twenty trillion, two billion, two million, two hundred twenty thousand, two hundred twenty-one".