12032112221 has 2 divisors, whose sum is σ = 12032112222. Its totient is φ = 12032112220.

The previous prime is 12032112203. The next prime is 12032112223. The reversal of 12032112221 is 12221123021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11926824100 + 105288121 = 109210^2 + 10261^2 .

It is a cyclic number.

It is not a de Polignac number, because 12032112221 - 2¹⁴ = 12032095837 is a prime.

Together with 12032112223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12032112221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12032112223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6016056110 + 6016056111.

It is an arithmetic number, because the mean of its divisors is an integer number (6016056111).

Almost surely, 2^12032112221 is an apocalyptic number.

It is an amenable number.

12032112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12032112221 is an equidigital number, since it uses as much as digits as its factorization.

12032112221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12032112221 its reverse (12221123021), we get a palindrome (24253235242).

The spelling of 12032112221 in words is "twelve billion, thirty-two million, one hundred twelve thousand, two hundred twenty-one".