1212346321 has 2 divisors, whose sum is σ = 1212346322. Its totient is φ = 1212346320.

The previous prime is 1212346301. The next prime is 1212346339. The reversal of 1212346321 is 1236432121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142440000 + 69906321 = 33800^2 + 8361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212346321 - 2⁹ = 1212345809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212346301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606173160 + 606173161.

It is an arithmetic number, because the mean of its divisors is an integer number (606173161).

Almost surely, 2^1212346321 is an apocalyptic number.

It is an amenable number.

1212346321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212346321 is an equidigital number, since it uses as much as digits as its factorization.

1212346321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 1212346321 is about 34818.7639211963. The cubic root of 1212346321 is about 1066.2905647453.

Adding to 1212346321 its reverse (1236432121), we get a palindrome (2448778442).

The spelling of 1212346321 in words is "one billion, two hundred twelve million, three hundred forty-six thousand, three hundred twenty-one".