20132120221 has 2 divisors, whose sum is σ = 20132120222. Its totient is φ = 20132120220.

The previous prime is 20132120213. The next prime is 20132120227. The reversal of 20132120221 is 12202123102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19464156196 + 667964025 = 139514^2 + 25845^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132120221 - 2³ = 20132120213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20132120195 and 20132120204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20132120227) 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 as a sum of consecutive naturals, namely, 10066060110 + 10066060111.

It is an arithmetic number, because the mean of its divisors is an integer number (10066060111).

Almost surely, 2^20132120221 is an apocalyptic number.

It is an amenable number.

20132120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132120221 is an equidigital number, since it uses as much as digits as its factorization.

20132120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20132120221 its reverse (12202123102), we get a palindrome (32334243323).

The spelling of 20132120221 in words is "twenty billion, one hundred thirty-two million, one hundred twenty thousand, two hundred twenty-one".