1230311321 has 2 divisors, whose sum is σ = 1230311322. Its totient is φ = 1230311320.

The previous prime is 1230311317. The next prime is 1230311333. The reversal of 1230311321 is 1231130321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1230255625 + 55696 = 35075^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230311321 - 2² = 1230311317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1230311321.

It is not a weakly prime, because it can be changed into another prime (1230311311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615155660 + 615155661.

It is an arithmetic number, because the mean of its divisors is an integer number (615155661).

Almost surely, 2^1230311321 is an apocalyptic number.

It is an amenable number.

1230311321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230311321 is an equidigital number, since it uses as much as digits as its factorization.

1230311321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1230311321 is about 35075.7939468232. The cubic root of 1230311321 is about 1071.5316583166.

Adding to 1230311321 its reverse (1231130321), we get a palindrome (2461441642).

The spelling of 1230311321 in words is "one billion, two hundred thirty million, three hundred eleven thousand, three hundred twenty-one".