20032231221 has 24 divisors (see below), whose sum is σ = 30479904000. Its totient is φ = 12642988032.

The previous prime is 20032231207. The next prime is 20032231229. The reversal of 20032231221 is 12213223002.

It is not a de Polignac number, because 20032231221 - 2⁶ = 20032231157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20032231194 and 20032231203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032231229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205365 + ... + 286773.

It is an arithmetic number, because the mean of its divisors is an integer number (1269996000).

Almost surely, 2^20032231221 is an apocalyptic number.

It is an amenable number.

20032231221 is a deficient number, since it is larger than the sum of its proper divisors (10447672779).

20032231221 is a wasteful number, since it uses less digits than its factorization.

20032231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82873 (or 82870 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20032231221 its reverse (12213223002), we get a palindrome (32245454223).

The spelling of 20032231221 in words is "twenty billion, thirty-two million, two hundred thirty-one thousand, two hundred twenty-one".