20331130221 has 16 divisors (see below), whose sum is σ = 30142944000. Its totient is φ = 13543848864.

The previous prime is 20331130189. The next prime is 20331130231. The reversal of 20331130221 is 12203113302.

It is not a de Polignac number, because 20331130221 - 2⁵ = 20331130189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20331130194 and 20331130203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331130231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247896 + ... + 319553.

It is an arithmetic number, because the mean of its divisors is an integer number (1883934000).

Almost surely, 2^20331130221 is an apocalyptic number.

It is an amenable number.

20331130221 is a deficient number, since it is larger than the sum of its proper divisors (9811813779).

20331130221 is a wasteful number, since it uses less digits than its factorization.

20331130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568785 (or 568779 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20331130221 its reverse (12203113302), we get a palindrome (32534243523).

The spelling of 20331130221 in words is "twenty billion, three hundred thirty-one million, one hundred thirty thousand, two hundred twenty-one".