12003032221 has 2 divisors, whose sum is σ = 12003032222. Its totient is φ = 12003032220.

The previous prime is 12003032219. The next prime is 12003032269. The reversal of 12003032221 is 12223030021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7380528100 + 4622504121 = 85910^2 + 67989^2 .

It is a cyclic number.

It is not a de Polignac number, because 12003032221 - 2¹ = 12003032219 is a prime.

Together with 12003032219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12003032195 and 12003032204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12003032521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001516110 + 6001516111.

It is an arithmetic number, because the mean of its divisors is an integer number (6001516111).

Almost surely, 2^12003032221 is an apocalyptic number.

It is an amenable number.

12003032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12003032221 is an equidigital number, since it uses as much as digits as its factorization.

12003032221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12003032221 its reverse (12223030021), we get a palindrome (24226062242).

It can be divided in two parts, 120030 and 32221, that added together give a palindrome (152251).

The spelling of 12003032221 in words is "twelve billion, three million, thirty-two thousand, two hundred twenty-one".