3121229 has 2 divisors, whose sum is σ = 3121230. Its totient is φ = 3121228.

The previous prime is 3121219. The next prime is 3121249. The reversal of 3121229 is 9221213.

3121229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (3121249) can be obtained adding 3121229 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1965604 + 1155625 = 1402^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121229 - 2⁸ = 3120973 is a prime.

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 3121229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560614 + 1560615.

It is an arithmetic number, because the mean of its divisors is an integer number (1560615).

Almost surely, 2^3121229 is an apocalyptic number.

It is an amenable number.

3121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121229 is an equidigital number, since it uses as much as digits as its factorization.

3121229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 3121229 is about 1766.7000311315. The cubic root of 3121229 is about 146.1420553952.

The spelling of 3121229 in words is "three million, one hundred twenty-one thousand, two hundred twenty-nine".