20333100221 has 6 divisors (see below), whose sum is σ = 23652790110. Its totient is φ = 17428371576.

The previous prime is 20333100199. The next prime is 20333100247. The reversal of 20333100221 is 12200133302.

It can be written as a sum of positive squares in only one way, i.e., 18636072196 + 1697028025 = 136514^2 + 41195^2 .

It is not a de Polignac number, because 20333100221 - 2⁶ = 20333100157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20333100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20333000221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207480566 + ... + 207480663.

It is an arithmetic number, because the mean of its divisors is an integer number (3942131685).

Almost surely, 2^20333100221 is an apocalyptic number.

It is an amenable number.

20333100221 is a deficient number, since it is larger than the sum of its proper divisors (3319689889).

20333100221 is an equidigital number, since it uses as much as digits as its factorization.

20333100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414961243 (or 414961236 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20333100221 its reverse (12200133302), we get a palindrome (32533233523).

The spelling of 20333100221 in words is "twenty billion, three hundred thirty-three million, one hundred thousand, two hundred twenty-one".