20132203221 has 12 divisors (see below), whose sum is σ = 31316760748. Its totient is φ = 12389048064.

The previous prime is 20132203213. The next prime is 20132203249. The reversal of 20132203221 is 12230223102.

20132203221 is a `hidden beast` number, since 20 + 1 + 322 + 0 + 322 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 784784196 + 19347419025 = 28014^2 + 139095^2 .

It is not a de Polignac number, because 20132203221 - 2³ = 20132203213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20132203194 and 20132203203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132203291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86034940 + ... + 86035173.

Almost surely, 2^20132203221 is an apocalyptic number.

It is an amenable number.

20132203221 is a deficient number, since it is larger than the sum of its proper divisors (11184557527).

20132203221 is a wasteful number, since it uses less digits than its factorization.

20132203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172070132 (or 172070129 counting only the distinct ones).

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

Adding to 20132203221 its reverse (12230223102), we get a palindrome (32362426323).

The spelling of 20132203221 in words is "twenty billion, one hundred thirty-two million, two hundred three thousand, two hundred twenty-one".