12320010221 has 2 divisors, whose sum is σ = 12320010222. Its totient is φ = 12320010220.

The previous prime is 12320010203. The next prime is 12320010251. The reversal of 12320010221 is 12201002321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7865916100 + 4454094121 = 88690^2 + 66739^2 .

It is a cyclic number.

It is not a de Polignac number, because 12320010221 - 2¹⁰ = 12320009197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12320010196 and 12320010205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12320010251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160005110 + 6160005111.

It is an arithmetic number, because the mean of its divisors is an integer number (6160005111).

Almost surely, 2^12320010221 is an apocalyptic number.

It is an amenable number.

12320010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320010221 is an equidigital number, since it uses as much as digits as its factorization.

12320010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12320010221 its reverse (12201002321), we get a palindrome (24521012542).

The spelling of 12320010221 in words is "twelve billion, three hundred twenty million, ten thousand, two hundred twenty-one".